--- .svn/text-base/node.module.svn-base	2006-12-04 22:55:04.000000000 -0700
+++ node.module	2006-12-08 14:01:09.000000000 -0700
@@ -173,19 +173,41 @@ function node_teaser($body, $format = NU
     return $body;
   }
 
+  // the teaser length is "the maximum number of characters used in the trimmed version of a post"
+  $teaser = truncate_utf8($body, $size);
+  // since we are trying to find the last occurance of something, the reversed teaser is useful
+  $reversed = strrev($teaser);
+
   // In some cases, no delimiter has been specified (e.g. when posting using
   // the Blogger API). In this case, we try to split at paragraph boundaries.
+  $breakpoints = array('</p>' => 0, '<br />' => 6, '<br>' => 4, "\n" => 1);
+  // strrpos() doesn't accept multi-character needles in PHP4,
+  // so we use strpos() and reverse the haystack and the needle
+  foreach ($breakpoints as $point => $offset) {
+    $length = strpos($reversed, strrev($point));
+    if ($length !== false) {
+      $position = 0 - $length - $offset;
+      return ($position == 0) ? $teaser : substr($teaser, 0, $position);
+    }
+  }
+
   // When even the first paragraph is too long, we try to split at the end of
-  // the next sentence.
-  $breakpoints = array('</p>' => 4, '<br />' => 0, '<br>' => 0, "\n" => 0, '. ' => 1, '! ' => 1, '? ' => 1, '。' => 3, '؟ ' => 1);
-  foreach ($breakpoints as $point => $charnum) {
-    if ($length = strpos($body, $point, $size)) {
-      return substr($body, 0, $length + $charnum);
+  // the last full sentence.
+  $breakpoints = array('. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1);
+  $shortest_length = false;
+  foreach ($breakpoints as $point => $offset) {
+    $length = strpos($reversed, strrev($point));
+    if ($length !== false and ($shortest_length === false or $length < $shortest_length)) {
+      $position = 0 - $length - $offset;
+      $shortest_length = $length;
     }
   }
+  if ($shortest_length !== false) {
+      return ($position == 0) ? $teaser : substr($teaser, 0, $position);
+  }
 
-  // If all else fails, we simply truncate the string.
-  return truncate_utf8($body, $size);
+  // If all else fails, we simply return the truncated string.
+  return $teaser;
 }
 
 /**