Hi DaNi,
here even on my actual 040@30Mhz. P96 and a CV64, it slow down only the window scroll.
I've replaced, quite all the icons and the PNG icons are displayed quicker than the 32 col GlowIcons ones.
What exactly is it "slow", with PowerIcons installed?
Ciao
PS- by the way, PI is faster on 32 bit screen
PPS- AFAIK, WBCtrl, hasn't those option, and then on which OS are you using it?