Comment 19 for bug 297143

I have the same issue with Slackware 13 ( kde 4.2.4 ), Firefox 3.5.2 and Thunderbird 3b4pre ( or and Thunderbird 3 ). If I have either of the two or both running, X will run with high CPU after a few hours from startup ( ie. not immediately ). This in turn slows down any plasma functions in KDE/Plasma. If I close both of FFox and TBird, then X drops to 1-5% after about a minute, which is normal. KDE plasma functions remain slow.

setup:

Slackware 13rc2 32-bit
NVidia 185.14.x
KDE 4.2.4
GSB ( Gnome Slackbuid ) 2.26.3