@Gav
so, download PowerIcons 1.05 from Aminet (the latest)
OOps, have your WB in Backdrop mode?
Add this line in your S-S BEFORE LoadWB:
Run >NIL: PowerIcons SCROLLSPEEDUP
Use SCROLLSPEEDUP option ONLY with the last 1.05 version.
Ciao
CORRECTION:
ONLY START POWERICONS FROM YOUR STARTUP SEQUENCE
JUST BEFORE LOADWB. IF SOME SIMILAR PROBLEM STILL OCCUR, TRY ADDING A DELAY 1 OR DELAY 2 COMMAND BETWEEBN POWERICONS AND LOADWB.