Hi,
I was trying to use Gnome Window Transparency Plugin, and after I enabled it and pressed Alt key while hovering mouse over the window, it did start working because by using scroll wheel I was able to change the window transparency. The problem is that every time after pressing Alt key I could do nothing else, because my mouse stopped functioning and I had to restart my system. I tried assigning Shift key instead, and it works, but only for browser window (firefox).
If you know, how to fix it, it would be appreciated.
Peace,
Marvin