I've got the latest LMDE XFCE installed and after a certain amount of time the CPU gets pegged to 100% untill I restart x, reboot or kill the xfce4-xfapplet-plugin prosesses. I'm using the Gnome Mint Menu and Volume control with the plugins. I haven't notice when this happens but I believe its when the screensaver comes on and when its interruped by computer usage. After that seems the fans are running non stop and the system monitor shows both CPU's at 100%
I've disabled the screensaver for now and will see what happens when it comes back on. Anthing else I could checkout/do in the mean time?