and in sys:prefs/workbench you set the icons to be loaded to fastram if you use os3.9
That's true, it works (in conjuntion with FBlit) and saves some chipmem when a bunch of icons are on the screen. BUT
You need to download
WBCtrl, add it to your startup-sequence directly before LoadWB:
WBCtrl IMT=ICONFAST
LoadWB SIMPLEGELS
Then there shouldn't be any issues (been working here for years.) See the FBlit docs and
here for more details.