My google voice number fowards to my desktop and my pre. Sometimes when a call comes in and I answer it on the desktop, I'm left with a big white area where the call notification was. The only way to dismiss it is to turn off the display (using the power button) and then turn it back on again. This would be a trivial annoyance except that it looks like it blocks new notifications until I do this.

The only posting I found that was close to this was this:
Blank notification bar stays on the screen after playing music???

Any ideas?