...minimize, maximize, close, etc. I can't resize the windows either...
When windows appear like this, as though missing their outer border, or you have other problems with 3D functions, you can quickly fix this by restarting Compiz 3D Desktop, if you don't want to disable 3D functions all together.

In the menu, under Knoppix sub-menu (or under Preferences on older versions) select (Re-) start 3D desktop compiz and in a moment the problem is solved.

You can explore and change the Compiz features, including the hotkeys that activate them, by opening CompizConfig Settings Manager under the Preferences submenu.