This is not a hint, strictly speaking, but it may save you some time.
Immediately after installing Tiger, I purchased a new QuickTime Pro license. After registering, I was mildly shocked to realise that one of my most frequently used features, Extract/Disable Track, was missing. Alas, it isn't, it just moved. It's now in the brand-new Show Movie Properties window. This window has a lot of improvements in the area of usability, by the way. Adding annotations e.g. is a breeze, compared to prior versions of the QuickTimePlayer.
Mac OS X Hints
http://hints.macworld.com/article.php?story=2005050417304567