I'm using KDE 4.7 (from the testing repo) on Arch Linux 3.0-ARCH, and it's very annoying that when I move my mouse to the top left, thumbnails of my windows appear—this is espically annoying which Firefox, that I made borderless so I can click on the tabs easily—I just have to move my mouse to the top.
Can anyone help me how to disable that hotspot?

