Enabling desktop effects removes window titles

[Johan Sandberg]

According to subject, when I enable desktop effects the window borders 
and window title disappears. When I first installed Ubuntu Feisty Fawn 
from scratch on this laptop (specifications found below) desktop effects 
worked like a charm.

What I've done is that a few weeks ago I disabled the desktop effects 
for some reason. Today I tried to enable it to get that wobbly feeling 
and general cosiness back to my desktop, but unfortunately without 
success...

Any ideas?

/sampan

Specifications on the laptop:
Compaq nw9440
Processor:       Core 2 Duo T7600
Graphic adapter: NVIDIA Quadro FX 1500M of 512MB
Memory:          1024 MB DDR2 RAM