Some remarks about how to get the full monty with compiz-fusion: no shadows behind "flat" windows like the kicker panel and katapult and blurry window borders.
Taaris' tip concerning ugly shadows behind katapult's fake transparency works also for kicker, e. g.
CCSM->Window Decoration->Shadow windows: any -(name="katapult" | name="kicker")
Window decoration blurring seems to work quite well by now with nVidia AIGLX, just check the following settings:
- CCSM->Blur Windows (activated)-> Alpha Blur (activated)
- Emerald Theme Manager->Emerald Settings->Compiz Decoration Blur Type: All decoration