Invalid redirect

[PRE]

Im running RC Webmail on Debian 5 and Apache2 with PHP5.
My client is Firefox 3.6.10 on Windows 7. When Im trying to create new message or reply for existing one I got "Invalid redirect" error in my browser. Theres screenshot from Firefox Console in attachments. Here is also PHPinfo and Roundcube Adress:

Code Select Expand

http://poczta.roni.com.pl/info.php
http://poczta.roni.com.pl/

It also happend with RC 0.4.1 and/or FF 4.0 Beta 6

[SKaero]

It sounds like this problem http://www.roundcubeforum.net/5-release-support/17-pending-issues/7317-redirect-error-when-clicking-write-new-mail-icon.html