Sudden new crazy Dock hiding behavior
1) If "Automatically Hide the Dock" is on, then Option-Command-D brings the Dock out for an instant, but it immediately pops right back in, hidden.
2) If auto-hide is off, then the command key sequence hides the Dock for an instant, but it pops right back out, visible.
In both cases, leaning on the command keys keeps the Dock visible/hidden for the duration, but as soon as I let go, back it goes!
Repaired permissions, trashed com.apple.dock.plist, yadda-yadda-yadda, and no joy.
Ever happen to anyone else?
PowerBook Pismo 500 Mac OS X (10.4.5)