Photoshop :: Image Should Not Move While Pressing Tab

There seems to be a bug in both Windows and Mac versions of Photoshop CS6. The problem manifests itself MUCH clearer on a Windows machine, but is present to some degree on a Mac, too. The last version without it seems to be CS3 (OpenSth problem?).
 
Steps to reproduce: Any image open, full screen mode, all pannels UNDOCKED: Correct behoviour: The image should not move while pressing Tab (ideally it shouldn't even redraw).
 
On Windows:
With every press of a Tab key to show/hide the panels the image jumps up several pixels (sometimes also towards the center of the screen if the image is smaller than the screen area). Also (and MUCH more annoyingly) when the image is moved off center and is at certain magnification (the most reproducible seems to be 33%) after pressing Tab it jumps ALL THE WAY to the center of the screen.
 
On Mac:
Similar things happen, but more rarely, and the image jumps by only ~1 pixel. (Easier to observe if you first zoom the image smoothly a bit by dragging with a zoom tool).
 
Also as it currently is (after CS3?) pressing F produces the same outcome as pressing Shift+F - there is no way of just showing the menu in Fullscreen mode and then quickly hiding it after use - one have to go through the whole screen mode cycle. Also on Windows there is no way to access the menu when hidden with Alt + Letter speedkey (Alt + F for file menu etc.). Both these functions worked perfectly well in CS3.
 
Both machines have latest Photoshop, OS updates and drivers (but old graphics cards: Win - Nvidia 9800GT, Mac Nvidia 880GT). I suspect these changes for the worse has been introduced while switching to OpenGL. Hopefully it is not necessary for it to be that way or maybe even it works as expected on newer graphics hardware.
 
Last time similar problems occured was, if I remember correctly, in Photoshop 7 when Status Bar has been moved into an image window :-) I know it may sound as if it's not important, but it certainly is annoying. It has nothing to do with not embracing change - I do find OpenWhatever to be a huge leap for Photoshop - even if I have to put up with a slower image redraw most of the time..