When I enable Compiz (System > Preferences > Appearance > Visual Effects), all the windows start to act funny with the mouse.
Wherever I click on any window with the mouse, it acts as though I was clicking on a titlebar. I can grab and move the window when I left-click it and when I right-click, the titlebar menu appears. All this prevents me from touching any object of the window I'm working on.
This happens with minimal, normal or any configuration, and prevents me from using Compiz at all.
BTW, this it a fresh install of 10.04 not an upgrade. I am re-installing all compiz packages to see if it gets fixed.
I just noticed that the mouses works ok while I hold down the CTRL button.