Index: includes/unicode.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/unicode.inc,v
retrieving revision 1.29
diff -u -p -r1.29 unicode.inc
--- includes/unicode.inc	28 Dec 2007 12:02:50 -0000	1.29
+++ includes/unicode.inc	9 Oct 2008 23:33:27 -0000
@@ -510,10 +510,10 @@ function drupal_substr($text, $start, $l
     else if ($length > 0) {
       // Count all the continuation bytes from the starting index until we have
       // found $length + 1 characters. Then backtrack one byte.
-      $bytes = $istart; $chars = 0;
+      $bytes = $istart+1; $chars = 0;
       while ($bytes < $strlen && $chars < $length) {
-        $bytes++;
         $c = ord($text[$bytes]);
+        $bytes++;
         if ($c < 0x80 || $c >= 0xC0) {
           $chars++;
         }