I have three fairly full desktops and got the same problems reoccuring in a daily cycle..

At first, it was fmtxd going frenzy from time to time, with only rebooting helping. Therefore, yesterday I removed and uninstalled the FM transmitter widget and uninstalled boost FM.

Directly afterwards, it was hildon-home going crazy. So I thought it would be Pelota Widget, which was the last one I installed. Removed this one too, did not help..

The biggest issue for me is this happening at night times. Overslept two times until now caused by a shut down phone, which shows me 100% CPU in battery graph before going down.. This is really annoying..