I have the same symptom but from other application. I can get X window to use 50 - 80% cpu usage when just change views, tabs, applications, etc. It doesn't always trigger high CPU usage - but enough to really bother me. CPU I have an AMD X2 4200 Video NVIDIA 6600 -- no native driver. OS Linux linuxbox 2.6.15-1.2054_FC5 #1 SMP Tue Mar 14 15:48:20 EST 2006 x86_64 x86_64 x86_64 GNU/Linux Qt: 3.3.5 KDE: 3.5.1-2.3 Red Hat KDE Daemon: $Id: kded.cpp 469257 2005-10-10 15:02:57Z coolo $ -- This is an email sent via the webforum on http://fcp.homelinux.org http://fcp.homelinux.org/modules/newbb/viewtopic.php?post_id=72983&topic_id=17722&forum=10#forumpost72983