I updated my Photoshop to 12.0.4 and having problem when I try to move a layer with mouse even I disable 'snap'. There is no problem if I try to move with keyboard. DO you have any idea how to fix this problem? I tried to show my problem in this video. http://www.youtube.com/watch?v=Sn2lYNl59bI
This gets complaned about frequently. There's a long thread some pages back about the frozen move tool. I suffer from it too, requiring a restart.
For some it was related to a keystroke program (iCopy, if I recall), but others get it regardless. Probably PS incompatability with input drivers, or such.
Edit: this is the thread I referred to:
You have not described anything about your system.
I saw this bug last year on a 2006 Mac Pro with nVidia 8800 video cards and Photoshop 12.0.0. The Photoshop 12.0.2 update fixed it though. Haven't seen it since (upgraded machines).