Comment 2 for bug 182288

Different card (nVidia GeForce4) but same effect.

Specifically:
+ with driver "nv": enabling special effects: black screen, showing only the mouse pointer.
   I tried individual effects, and it suffices to enable "Desktop Grid" to trigger the bug.
+ with driver "nvidia" from nvidia-glx: no black screen, but none of the effects actually worked,
   i.e., after enabling nothing had changed.

Between tests I removed ${HOME}/.kde4, but it would be great to know more specifically
which files need to be reset, because naturally I don't want to discard all my personally
settings n-times.

Since I've seen the effects on another machine (with i810 driver) I know how cool they are ;-)