Hi, I'm a new user of your Login with AJAX Plugin for Wordpress.
I love your plugin, but it introduces an error and makes my web not valid XHTML 1.0.
The error is simple to solve: in XHTML the ampersands must be encoded as a special character.
So, in the lines 162 and 329 of login-with-ajax.php you must replace "&" with "&" and that's it!
Keep working on this wonderful plugin. Thanks.