Ticket #2823: sanitize_filenames.diff

wp-admin/admin-functions.php

@@ -1882 +1882 @@
                         else
                                 $filename = str_replace("$number$ext", ++$number . $ext, $filename);
                 }
-                $filename = preg_replace('#\.(?![^.]+$)#', '-', $filename);
+                $filename = str_replace($ext, '', $filename);
+                $filename = sanitize_title_with_dashes($filename) . $ext;
         }
 
         // Move the file to the uploads dir