Dolphin sometimes runs at 60 fps,sometimes at 2 fps

[rpglord]

I have very strange problem with dolphin,it's present in about 500 last revisions ( about time watchdog was first introduced )
Basically most of the time everything works fine as it should,but sometimes it's just unusable as it runs at about 2-3 fps instead of normal speed. I have tested this on numerous games,and on all kind of diffrent settings,trust me I had time to test since this problem appeared,like I said,about 500 revisions ago.
My setup is c2d @ 3.33 ghz, 9800 gt, newest drivers etc...
Anybody has any idea ? Because it doesnt seem everybody is having this problem,or it would be fixed by now...