- Patch #10166 by jvandyk: bugfix: valid_url() believed that URLs with encoded spaces in them (eg. http://example.org/my%20file.html ) are not valid.

includes/common.inc

@@ -608,7 +608,7 @@ function valid_email_address($mail) {
  */
 function valid_url($url, $absolute = FALSE) {
   if ($absolute) {
-    return preg_match("/^(http|https|ftp):\/\/[a-z0-9\/:_\-_\.\?,~=#&]+$/i", $url);
+    return preg_match("/^(http|https|ftp):\/\/[a-z0-9\/:_\-_\.\?,~=#&%]+$/i", $url);
   }
   else {
     return preg_match("/^[a-z0-9\/:_\-_\.,]+$/i", $url);