Take full screen DVD snapshots
You may have noticed that Apple doesn't want you taking screenshots of DVD movies you're watching with their DVD Player software. If you try one of the usual keyboard shortcuts while a DVD is playing, you'll get a message that says something along the lines of, "Nice try, Bub."
If you still insist on getting that screen grab, check out DVD Snap. It will let you grab a full screen capture, a smaller window-sized screenshot and even set up sequential captures (every 6 seconds, for example). Pretty useful if you wanted to set up a slideshow.
DVD Snap is universal and requires Mac OS 10.4 or later. A single license will cost you $19.95US. Of course, Snapz Pro does this (and a lot more) for only slightly more money, so shop around.
[Via Macworld]