Why does my notification bar get stuck on Galaxy S?
I HAVE FOUND A WORKAROUND!!!

First some details. This happens on the Galaxy S when you try to open the notification bar during high load. A reboot will reset it. But if you don't want to reboot:

Do this QUICKLY: Tap the notification bar, just before releasing it tap on the bottom half of the screen, release the finger from notification bar, release the finger from the bottom half of the screen.

This will trigger the notification bar to FULLY OPEN ITSELF!