I have a strange problem and can't find a reason. When in index.php is used ob_start('ob_gzhandler') I've problem in firefox (Opera works fine). When I'm clicking on messages list, sometimes (very often) firefox hangs for a while and then starts downloading some binary file. When I save such file, it looks almost like normal http response but have some garbage data at the beginning:
^.^......^^.....^.........HTTP/1.1 200 OK^ Date: Thu, 20 Mar 2008 11:56:51 GMT^ Server: Apache^ X-Powered-By: PHP/5.2.6RC1-pl1-gentoo^ Expires: ^ Cache-Control: max-age=0^ Pragma: ^ Last-Modified: Thu, 20 Mar 2008 11:20:48 GMT^ Etag: "058647647f9d1a70ff82f95eaa7db16a"^ Content-Encoding: gzip^ Vary: Accept-Encoding^ Content-Length: 1813^ Keep-Alive: timeout=15, max=74^ Connection: Keep-Alive^ Content-Type: text/html; charset=UTF-8^
<cut properly gzipped page content>
What could it be? Roundcube in current svn version.