diff -urpN --exclude-from ../..//misc/ignorelist drupal/includes/common.inc drupal-rtl/includes/common.inc
--- drupal/includes/common.inc	2007-05-21 20:35:01.000000000 +0300
+++ drupal-rtl/includes/common.inc	2007-05-16 15:15:10.000000000 +0300
@@ -1449,6 +1449,10 @@ function drupal_add_link($attributes) {
  * @param $path
  *   (optional) The path to the CSS file relative to the base_path(), e.g.,
  *   /modules/devel/devel.css.
+ *   If the current language is an RTL language (Hebrew, Arabic...), the 
+ *   function will look for an RTL version of the CSS file in question. 
+ *   This file should be have a '-rtl' suffix to its name, e.g., a CSS file 
+ *   called 'name.css' will become 'name-rtl.css'.
  * @param $type
  *   (optional) The type of stylesheet that is being added. Types are: module
  *   or theme.
@@ -1482,6 +1486,7 @@ function drupal_add_link($attributes) {
  */
 function drupal_add_css($path = NULL, $type = 'module', $media = 'all', $preprocess = TRUE) {
   static $css = array();
+  global $language;	
 
   // Create an array of CSS files for each media type first, since each type needs to be served
   // to the browser differently.
@@ -1490,6 +1495,14 @@ function drupal_add_css($path = NULL, $t
     if (!isset($css[$media])) {
       $css[$media] = array('module' => array(), 'theme' => array());
     }
+    // If the current language is RTL, return the RTLized version of CSS (instaed of 'name.css', return 'name-rtl.css')
+    if ($language->direction == LANGUAGE_RTL){
+        // Check if a RTL version exist, and if it does, replace $path
+        $rtl_path = str_replace(".css","-rtl.css",$path);
+        if (file_exists($rtl_path)) {
+          $path = $rtl_path;
+        }
+    }
     $css[$media][$type][$path] = $preprocess;
   }
 
Files drupal/misc/menu-collapsed-rtl.png and drupal-rtl/misc/menu-collapsed-rtl.png differ
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/aggregator/aggregator-rtl.css drupal-rtl/modules/aggregator/aggregator-rtl.css
--- drupal/modules/aggregator/aggregator-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/aggregator/aggregator-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,38 @@
+/* $Id: aggregator.css,v 1.1 2006/08/14 07:14:48 drumm Exp $ */
+
+#aggregator .feed-source .feed-title {
+  margin-top: 0;
+}
+#aggregator .feed-source .feed-image img {
+  margin-bottom: 0.75em;
+}
+#aggregator .feed-source .feed-icon {
+  float: left;
+  display: block;
+}
+#aggregator .feed-item {
+  margin-bottom: 1.5em;
+}
+#aggregator .feed-item-title {
+  margin-bottom: 0;
+  font-size: 1.3em;
+}
+#aggregator .feed-item-meta, #aggregator .feed-item-body {
+  margin-bottom: 0.5em;
+}
+#aggregator .feed-item-categories {
+  font-size: 0.9em;
+}
+#aggregator td {
+  vertical-align: bottom;
+}
+#aggregator td.categorize-item {
+  white-space: nowrap;
+}
+#aggregator .categorize-item .news-item .body {
+  margin-top: 0;
+}
+#aggregator .categorize-item h3 {
+  margin-bottom: 1em;
+  margin-top: 0;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/block/block-rtl.css drupal-rtl/modules/block/block-rtl.css
--- drupal/modules/block/block-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/block/block-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,14 @@
+/* $Id: block.css,v 1.2 2006/12/07 19:50:31 unconed Exp $ */
+
+#blocks td.region {
+  font-weight: bold;
+}
+#blocks td.block {
+  padding-right: 1.5em;
+}
+.block-region {
+  background-color: #ff6;
+  margin-top: 4px;
+  margin-bottom: 4px;
+  padding: 3px;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/book/book-rtl.css drupal-rtl/modules/book/book-rtl.css
--- drupal/modules/book/book-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/book/book-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,30 @@
+/* $Id: book.css,v 1.2 2006/11/14 06:30:10 drumm Exp $ */
+
+.book-navigation .menu {
+  border-top: 1px solid #888;
+  padding: 1em 0 0 3em;
+}
+.book-navigation .page-links {
+  border-top: 1px solid #888;
+  border-bottom: 1px solid #888;
+  text-align: center;
+  padding: 0.5em;
+}
+.book-navigation .page-previous {
+  text-align: left;
+  width: 42%;
+  display: block;
+  float: right;
+}
+.book-navigation .page-up {
+  margin: 0 5%;
+  width: 4%;
+  display: block;
+  float: right;
+}
+.book-navigation .page-next {
+  text-align: right;
+  width: 42%;
+  display: block;
+  float: right;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/comment/comment-rtl.css drupal-rtl/modules/comment/comment-rtl.css
--- drupal/modules/comment/comment-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/comment/comment-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,3 @@
+.indented {
+  margin-right: 25px;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/forum/forum-rtl.css drupal-rtl/modules/forum/forum-rtl.css
--- drupal/modules/forum/forum-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/forum/forum-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,29 @@
+/* $Id: forum.css,v 1.2 2006/11/14 06:30:10 drumm Exp $ */
+
+#forum .description {
+  font-size: 0.9em;
+  margin: 0.5em;
+}
+#forum td.created, #forum td.posts, #forum td.topics, #forum td.last-reply, #forum td.replies, #forum td.pager {
+  white-space: nowrap;
+}
+#forum td.posts, #forum td.topics, #forum td.replies, #forum td.pager {
+  text-align: center;
+}
+.forum-topic-navigation {
+  padding: 1em 3em 0 0;
+  border-top: 1px solid #888;
+  border-bottom: 1px solid #888;
+  text-align: center;
+  padding: 0.5em;
+}
+.forum-topic-navigation .topic-previous {
+  text-align: left;
+  float: right;
+  width: 46%;
+}
+.forum-topic-navigation .topic-next {
+  text-align: right;
+  float: left;
+  width: 46%;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/help/help-rtl.css drupal-rtl/modules/help/help-rtl.css
--- drupal/modules/help/help-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/help/help-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,10 @@
+/* $Id: help.css,v 1.1 2006/08/14 07:14:49 drumm Exp $ */
+
+.help-items {
+  float: right;
+  width: 22%;
+  padding-left: 3%;
+}
+.help-items-last {
+  padding-left: 0;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/node/node-rtl.css drupal-rtl/modules/node/node-rtl.css
--- drupal/modules/node/node-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/node/node-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,41 @@
+/* $Id: node.css,v 1.2 2006/09/05 03:50:56 unconed Exp $ */
+
+.node-unpublished, .comment-unpublished {
+  background-color: #fff4f4;
+}
+.preview .node, .preview .comment {
+  background-color: #ffffea;
+}
+#node-admin-filter ul {
+  list-style-type: none;
+  padding: 0;
+  margin: 0;
+  width: 100%;
+}
+#node-admin-buttons {
+  float: right;
+  margin-right: 0.5em;
+  clear: left;
+}
+td.revision-current {
+  background: #ffc;
+}
+.node-form .form-text {
+  display: block;
+  width: 95%;
+}
+.node-form .container-inline .form-text {
+  display: inline;
+  width: auto;
+}
+.node-form .standard {
+  clear: both;
+}
+.node-form textarea {
+  display: block;
+  width: 95%;
+}
+.node-form .attachments fieldset {
+  float: none;
+  display: block;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/search/search-rtl.css drupal-rtl/modules/search/search-rtl.css
--- drupal/modules/search/search-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/search/search-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,35 @@
+/* $Id: search.css,v 1.1 2006/08/14 07:14:49 drumm Exp $ */
+
+.search-form {
+  margin-bottom: 1em;
+}
+.search-form p {
+  margin-top: 0;
+  margin-bottom: 0.2em;
+  padding-top: 0;
+  padding-bottom: 0;
+}
+.search-form input {
+  margin-top: 0;
+  margin-bottom: 0;
+}
+.search-results p {
+  margin-top: 0;
+}
+.search-results dt {
+  font-size: 1.1em;
+}
+.search-results dd {
+  margin-bottom: 1em;
+}
+.search-results .search-info {
+  font-size: 0.85em;
+}
+.search-advanced .criterion {
+  float: right;
+  margin-left: 2em;
+}
+.search-advanced .action {
+  float: right;
+  clear: right;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/system/defaults-rtl.css drupal-rtl/modules/system/defaults-rtl.css
--- drupal/modules/system/defaults-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/system/defaults-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,53 @@
+/* $Id: defaults.css,v 1.2 2006/08/25 09:01:12 drumm Exp $ */
+
+/*
+** HTML elements
+*/
+fieldset {
+  margin-bottom: 1em;
+  padding: .5em;
+}
+form {
+  margin: 0;
+  padding: 0;
+}
+hr {
+  height: 1px;
+  border: 1px solid gray;
+}
+img {
+  border: 0;
+}
+table {
+  border-collapse: collapse;
+}
+th {
+  text-align: right;
+  padding-left: 1em;
+  border-bottom: 3px solid #ccc;
+}
+
+/*
+** Markup free clearing
+** Details: http://www.positioniseverything.net/easyclearing.html
+*/
+.clear-block:after {
+  content: ".";
+  display: block;
+  height: 0;
+  clear: both;
+  visibility: hidden;
+}
+
+.clear-block {
+  display: inline-block;
+}
+
+/* Hides from IE-mac \*/
+* html .clear-block {
+  height: 1%;
+}
+.clear-block {
+  display: block;
+}
+/* End hide from IE-mac */
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/system/system-rtl.css drupal-rtl/modules/system/system-rtl.css
--- drupal/modules/system/system-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/system/system-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,393 @@
+/* $Id: system.css,v 1.21 2006/12/21 16:13:06 dries Exp $ */
+
+/*
+** HTML elements
+*/
+th.active img {
+  display: inline;
+}
+tr.even, tr.odd {
+  background-color: #eee;
+  border-bottom: 1px solid #ccc;
+  padding: 0.1em 0.6em;
+}
+td.active {
+  background-color: #ddd;
+}
+tbody {
+  border-top: 1px solid #ccc;
+}
+tbody th {
+  border-bottom: 1px solid #ccc;
+}
+thead th {
+  text-align: right;
+  padding-left: 1em;
+  border-bottom: 3px solid #ccc;
+}
+
+/*
+** Other common styles
+*/
+.breadcrumb {
+  padding-bottom: .5em
+}
+.error {
+  color: #f00;
+}
+div.error {
+  border: 1px solid #d77;
+}
+div.error, tr.error {
+  background: #fcc;
+  color: #200;
+}
+div.warning, tr.warning {
+  background: #ffd;
+}
+div.ok, tr.ok {
+  background: #dfd;
+}
+.item-list .icon {
+  color: #555;
+  float: left;
+  padding-right: 0.25em;
+  clear: left;
+}
+.item-list .title {
+  font-weight: bold;
+}
+.item-list ul {
+  margin: 0 0 0.75em 0;
+  padding: 0;
+}
+.item-list ul li {
+  margin: 0 1.5em 0.25em 0;
+  padding: 0;
+  list-style: disc;
+}
+.form-item {
+  margin-top: 1em;
+  margin-bottom: 1em;
+}
+tr.odd .form-item, tr.even .form-item {
+  margin-top: 0;
+  margin-bottom: 0;
+  white-space: nowrap;
+}
+tr.merge-down, tr.merge-down td, tr.merge-down th {
+  border-bottom-width: 0 !important;
+}
+tr.merge-up, tr.merge-up td, tr.merge-up th {
+  border-top-width: 0 !important;
+}
+.form-item input.error, .form-item textarea.error, .form-item select.error {
+  border: 2px solid red;
+}
+.form-item .description {
+  font-size: 0.85em;
+}
+.form-item label {
+  display: block;
+  font-weight: bold;
+}
+.form-item label.option {
+  display: inline;
+  font-weight: normal;
+}
+.form-checkboxes, .form-radios {
+  margin: 1em 0;
+}
+.form-checkboxes .form-item, .form-radios .form-item {
+  margin-top: 0.4em;
+  margin-bottom: 0.4em;
+}
+.marker, .form-required {
+  color: #f00;
+}
+.more-link {
+  text-align: left;
+}
+.more-help-link {
+  font-size: 0.85em;
+  text-align: left;
+}
+.nowrap {
+  white-space: nowrap;
+}
+.pager {
+  clear: both;
+  text-align: center;
+}
+.pager a, .pager strong.pager-current {
+  padding: 0.5em;
+}
+.tips {
+  margin-top: 0;
+  margin-bottom: 0;
+  padding-top: 0;
+  padding-bottom: 0;
+  font-size: 0.9em;
+}
+dl.multiselect dd.b, dl.multiselect dd.b .form-item, dl.multiselect dd.b select {
+  font-family: inherit;
+  font-size: inherit;
+  width: 14em;
+}
+dl.multiselect dd.a, dl.multiselect dd.a .form-item {
+  width: 8em;
+}
+dl.multiselect dt, dl.multiselect dd {
+  float: right;
+  line-height: 1.75em;
+  padding: 0;
+  margin: 0 0 0 1em;
+}
+dl.multiselect .form-item {
+  height: 1.75em;
+  margin: 0;
+}
+
+/*
+** Inline items (need to override above)
+*/
+.container-inline div, .container-inline label {
+  display: inline;
+}
+
+/*
+** Menus
+*/
+ul.menu {
+  list-style: none;
+  border: none;
+  text-align:right;
+}
+ul.menu li {
+  margin: 0 0.5em 0 0;
+}
+li.expanded {
+  list-style-type: circle;
+  list-style-image: url(../../misc/menu-expanded.png);
+  padding: 0.2em 0 0 0.5em;
+  margin: 0;
+}
+li.collapsed {
+  list-style-type: disc;
+  list-style-image: url(../../misc/menu-collapsed-rtl.png);
+  padding: 0.2em 0 0 0.5em;
+  margin: 0;
+}
+li.leaf {
+  list-style-type: square;
+  list-style-image: url(../../misc/menu-leaf.png);
+  padding: 0.2em 0 0 0.5em;
+  margin: 0;
+}
+li a.active {
+  color: #000;
+}
+td.menu-disabled {
+  background: #ccc;
+}
+ul.links {
+  margin: 0;
+  padding: 0;
+}
+ul.links.inline {
+  display: inline;
+}
+ul.links li {
+  display: inline;
+  list-style-type: none;
+  padding: 0 0.5em;
+}
+.block ul {
+  margin: 0;
+  padding: 0 1em 0.25em 0;
+}
+
+/*
+** Tab navigation
+*/
+ul.primary {
+  border-collapse: collapse;
+  padding: 0 1em 0 0;
+  white-space: nowrap;
+  list-style: none;
+  margin: 5px;
+  height: auto;
+  line-height: normal;
+  border-bottom: 1px solid #bbb;
+}
+ul.primary li {
+  display: inline;
+}
+ul.primary li a {
+  background-color: #ddd;
+  border-color: #bbb;
+  border-width: 1px;
+  border-style: solid solid none solid;
+  height: auto;
+  margin-left: 0.5em;
+  padding: 0 1em;
+  text-decoration: none;
+}
+ul.primary li.active a {
+  background-color: #fff;
+  border: 1px solid #bbb;
+  border-bottom: #fff 1px solid;
+}
+ul.primary li a:hover {
+  background-color: #eee;
+  border-color: #ccc;
+  border-bottom-color: #eee;
+}
+ul.secondary {
+  border-bottom: 1px solid #bbb;
+  padding: 0.5em 1em;
+  margin: 5px;
+}
+ul.secondary li {
+  display: inline;
+  padding: 0 1em;
+  border-left: 1px solid #ccc;
+}
+ul.secondary a {
+  padding: 0;
+  text-decoration: none;
+}
+ul.secondary a.active {
+  border-bottom: 4px solid #999;
+}
+
+/*
+** Autocomplete styles
+*/
+/* Suggestion list */
+#autocomplete {
+  position: absolute;
+  border: 1px solid;
+  overflow: hidden;
+  z-index: 100;
+}
+#autocomplete ul {
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+#autocomplete li {
+  background: #fff;
+  color: #000;
+  white-space: pre;
+  cursor: default;
+}
+#autocomplete li.selected {
+  background: #0072b9;
+  color: #fff;
+}
+/* Animated throbber */
+html.js input.form-autocomplete {
+  background-image: url(../../misc/throbber.gif);
+  background-repeat: no-repeat;
+  background-position: 0% 2px;
+}
+html.js input.throbbing {
+  background-position: 0% -18px;
+}
+
+/*
+** Collapsing fieldsets
+*/
+html.js fieldset.collapsed {
+  border-bottom-width: 0;
+  border-right-width: 0;
+  border-left-width: 0;
+  margin-bottom: 0;
+  height: 1em;
+}
+html.js fieldset.collapsed * {
+  display: none;
+}
+html.js fieldset.collapsed legend {
+  display: block;
+}
+html.js fieldset.collapsible legend a {
+  padding-right: 15px;
+  /*background: url(../../misc/menu-expanded.png) 5px 75% no-repeat;*//* LTR version*/
+	background: url(../../misc/menu-expanded.png) 98% 75% no-repeat;
+}
+html.js fieldset.collapsed legend a {
+  background-image: url(../../misc/menu-collapsed-rtl.png);
+  background-position: 98% 50%;
+}
+/* Note: IE-only fix due to '* html' (breaks Konqueror otherwise). */
+* html.js fieldset.collapsed legend,
+* html.js fieldset.collapsed legend *,
+* html.js fieldset.collapsed table * {
+  display: inline;
+}
+html.js fieldset.collapsible legend a {
+  display: block;
+}
+/* Avoid jumping around due to margins collapsing into collapsible fieldset border */
+html.js fieldset.collapsible .fieldset-wrapper {
+  overflow: auto;
+}
+
+/*
+** Resizable text areas
+*/
+.resizable-textarea {
+  width: 95%;
+}
+.resizable-textarea .grippie {
+  height: 9px;
+  overflow: hidden;
+  background: #eee url(../../misc/grippie.png) no-repeat center 2px;
+  border: 1px solid #ddd;
+  border-top-width: 0;
+  cursor: s-resize;
+}
+html.js .resizable-textarea textarea {
+  margin-bottom: 0;
+  width: 100%;
+  display: block;
+}
+
+/*
+** Progressbar styles
+*/
+.progress {
+  font-weight: bold;
+}
+.progress .bar {
+  background: #fff url(../../misc/progress.gif);
+  border: 1px solid #00375a;
+  height: 1.5em;
+  margin-top: 0.2em;
+}
+.progress .filled {
+  background: #0072b9;
+  height: 1em;
+  border-bottom: 0.5em solid #004a73;
+  width: 0%;
+}
+.progress .percentage {
+  float: left;
+}
+
+/*
+** Formatting for welcome page
+*/
+#first-time strong {
+  display: block;
+  padding: 1.5em 0 .5em;
+}
+
+/*
+** To be used with tableselect.js
+*/
+tr.selected td {
+  background: #ffc;
+}
diff -urpN --exclude-from ../..//misc/ignorelist drupal/modules/user/user-rtl.css drupal-rtl/modules/user/user-rtl.css
--- drupal/modules/user/user-rtl.css	1970-01-01 02:00:00.000000000 +0200
+++ drupal-rtl/modules/user/user-rtl.css	2007-05-21 20:25:38.000000000 +0300
@@ -0,0 +1,49 @@
+/* $Id: user.css,v 1.4 2006/12/30 07:45:31 dries Exp $ */
+
+#permissions td.module {
+  font-weight: bold;
+}
+#permissions td.permission {
+  padding-right: 1.5em;
+}
+#access-rules .access-type, #access-rules .rule-type {
+  margin-left: 1em;
+  float: right;
+}
+#access-rules .access-type .form-item, #access-rules .rule-type .form-item {
+  margin-top: 0;
+}
+#access-rules .mask {
+  clear: both;
+}
+#user-login-form {
+  text-align: center;
+}
+#user-admin-filter ul {
+  list-style-type: none;
+  padding: 0;
+  margin: 0;
+  width: 100%;
+}
+#user-admin-buttons {
+  float: right;
+  margin-right: 0.5em;
+  clear: left;
+}
+
+/* Generated by user.module but used by profile.module: */
+.profile {
+  clear: both;
+  margin: 1em 0;
+}
+.profile .picture {
+  float: left;
+  margin: 0 0 1em 1em;
+}
+.profile dt {
+  margin: 1em 0 0.2em 0;
+  font-weight: bold;
+}
+.profile dd {
+  margin:0;
+}