My bad. It’s the lower right corner.
I’m using openSUSE 12.1 with the KDE DE 64 bits just with the official stable repos.
My graphic card is an AMD Radeon HD Mobility 3470. It’s a laptop.
The graphic driver installed is the Catalyst 11.12, which I installed via yast through official openSUSE 12.1 repos according to the description in the link below,
It’s a known issue. This happened some releases ago (talking now about the proprietary graphic driver). It has nothing to do with the touch-pad or the desktop effects. Actually, it still occurs when they are disabled (the effects). It’s not, defenitly, any action I’ve set up to the corners…
I use kwin, not compiz and the problem cannot be reproduced with the open drivers. So, the open drivers work just perfect in my KDE Desktop (but I would like to use the proprietary ones for whatever reason).
The system appears to freeze around 1 or 1,5 seconds when the pointer goes around the lower right corner.