Fix of Flicker Fix
If you read my post about Flicker Fix that was included and removed from the first distribution of <u><font color="#006ff7">CSS friendly control adapters beta</font></u> you might have heard that it created a security hole.
Having a handler or other reading a file that you might specify the path in a parameter is a really <strong>really</strong> bad idea. It lets for example read possibility to your web.config file to anybody just browsing your site. If your connection string to the db is in clear then... too bad.