Completely random question.. I'm trying to do a window screen grab (cmd+shft+4 and then hitting space bar) on my internet browser; this problem happens for both Safari and Firefox. The problem is, I'm only getting about 75% of the window on my PNG file. The weird thing is, when I go to Utilities->Grab->Capture->Window, I get the whole window; so it seems to only happen on the short cut.

Is there any trick out there to re-calibrate the short cut? It's very random but any help someone could provide would be greatly appreciated.

Here's a screen shot to show what I'm talking about...