如何避免使用url重写破坏TinyMCE弹出窗口？

I have a website which uses TinyMCE textboxes for editing. It works fine except for the toolbar options which open a popup window as it seems to be caught by my url rewriting in the .htaccess file. Each of them show my 404-page. The url rewriting is set up so that all urls (except ajax calls) are sent to an index.php file. It seems obvious that the popup windows are caught by this as well but I have no idea what url signatrues to look for in the .htaccess file, so do anyone know what kind of pattern I can match against?I have a website which uses TinyMCE textboxes f