How do I take a screenshot without the shadow behind it? If I take a screenshot with Shift ⇧ + Command ⌘ + 4 + Space, then I get one of the two images:

  

Either way the saved image is surrounded by the shadow halo. I could then edit it out by hand (using Preview) to discard the shadow, or I could use Shift ⇧ + Command ⌘ + 4 and try to pinpoint the boundary by hand, but neither lets me get a pixel-perfect boundary easily.

Is there a convenient way to save a window without its shadow?
I know this is an old question - but I can never find this information when searching for it (just the information in the accepted answer to turn it off globally), and end up just trying random keys each time.
If you hold option while clicking (after doing the Shift ⇧ + Command ⌘ + 4, Space dance), the saved screenshot will not have the drop shadow.
I'm unsure if this only applies to Mountain Lion and later.