OS X :: Capture Maximized Window With Shadow?

I came across some strange Grab behavior today while trying to capture a maximized window using the shortcut key for a window grab.

While having the window I wanted to grab active, I pressed Cmd + Shift + 4 to get the box selection grab, then pressed Space to get the Window capture tool. I clicked the active window and this is what came out:

As you can see, the right side of the window is missing..

Can someone reproduce this? Or is it just on my end?