Logitech mouse problem

[Chuma]

There was a thread a few months ago, where someone said that the dock does not pop up when you move the mouse over it, and the sub-menus are not highlighted when you move the mouse over them.

I have a similar problem, but I'm not sure if it's the same, so I'm making a new thread.

Two users had the same problem, both of them using Logitech wireless mouses, as do I. Trevor said that "The new Logitech mouse driver includes APE: Application Enhancer, which has been the cause of many compatibility problems." But the thing is, I have 10.5 now, and no APE. I did have APE before, which gave me a great deal of trouble when upgrading to 10.5. But I did "archive and install" and now there's no trace of it. So it seem unlikely that that's the problem.

The problem is not limited to the dock. It seems that the computer stops reacting to any kind of mouse movement without a button pressed. The active screen corners don't work, but I use mouse button 3 for Exposé, and that does work. Oddly, if I hold down that mouse button and do the show-desktop-active-corner, that works too, but only if I hold the mouse button. When playing a film in full screen in for example VLC, the controls don't appear on mouse movements as they should; they only appear after I click. Same thing with those little roll-over image captions on web pages; they only appear when I click (which is of course impossible if the image is a link). The bookmark bar in Safari doesn't light up when the mouse is moved over it, and so on.

The problem is not always there. It seems to disappear when I restart the computer, and reappear each morning after the computer has been in screen sleep during the night.

I tried just now disconnecting the mouse, and switching to the old Apple mouse. It all seems to work now, even after I switch back. Which makes the problem less acute, but still irritating.

So it seems pretty clear that is has to do with the mouse, but I quite like the mouse otherwise. Any ideas as to how this can be solved without switching mouse?

My specs:
iMac, 2 GHz PowerPC G5
OS 10.5.2
512 MB DDR SDRAM
Logitech optical cordless USB mouse, two buttons and scroll wheel