Crop frame jump

Hello,

I have a problem with mouse move in PS CS4 on Vista Home Premium 64bit. The problem is the following:
I select an area with the crop tool. Then try to drag and move the crop frame a bit, eg. move 10px left. But when I try to drag the frame it immediately jumps some hundred pixel away in random directions.
The problem occures in case of healing brush as well. Sometimes the cursor jumps far away.

My first idea was that maybe I have problem with my mouse, but I didn't recognized any problem with the mouse pointer in any other application. Besides this the above mentioned problem occures on a different machine as well (Also PS CS4 and Vista Home Premium 64bt.)

Any idea what should I check?

Thanks in advance!

You should ask about this on the Adobe PS forum.