--- a/core/string_api.php	2009-07-15 14:50:44.000000000 +1000
+++ b/core/string_api.php	2009-07-15 14:26:39.000000000 +1000
@@ -457,7 +457,7 @@
 		$t_url_hex = '%[[:digit:]A-Fa-f]{2}';
 
 		# valid set of characters that may occur in url scheme. Note: - should be first (A-F != -AF).
-		$t_url_valid_chars = '-_.,!~*\';\/?%^\\\\:@&={\|}+$#[:alnum:]\pL';
+		$t_url_valid_chars = '-_.,!~*\';\/?%^\\\\:@&={\|}+$#[:alnum:]\w';
 
 		$t_url_chars = "(?:${t_url_hex}|[${t_url_valid_chars}\(\)\[\]])";
 		$t_url_chars2 = "(?:${t_url_hex}|[${t_url_valid_chars}])";
@@ -467,7 +467,7 @@
 		$t_url_part1 = "${t_url_chars}";
 		$t_url_part2 = "(?:\(${t_url_chars_in_parens}*\)|\[${t_url_chars_in_brackets}*\]|${t_url_chars2})";
 
-		$s_url_regex = "/(([[:alpha:]][-+.[:alnum:]]*):\/\/(${t_url_part1}*?${t_url_part2}+))/sue";
+		$s_url_regex = "/(([[:alpha:]][-+.[:alnum:]]*):\/\/(${t_url_part1}*?${t_url_part2}+))/se";
 	}
 
 	$p_string = preg_replace( $s_url_regex, "'<a href=\"'.rtrim('\\1','.').'\">\\1</a> [<a href=\"'.rtrim('\\1','.').'\" target=\"_blank\">^</a>]'", $p_string );