OH HAI, it's a Vista Performance Tip. I got quite excited when I saw this title pop up in my RSS reader, because my Vista based work rig runs incredibly sluggishly for a well specced box, and I'd hoped to tweak it into performing properly (note: simply turning off everything aero related doesn't sound here).
Anyroad, the tip seems to be fixing a problem I've not encountered, however it might be worth remembering or applying.. or maybe I should just go back to XP.. /shrug