This is very poor and very microsoft... I'm so disappointed in Apple, the support people want me to pay to get a solution to this.. I've got my amazing iMac on my desktop and my video's won't play properly in the standard player. Absolute rubbish. It's all going down hill for Apple... they've taken away frontrow as well!! Stupid decision! pointless having a remote now.
I can't believe so many people are experiencing this and Apple haven't come up with a solution yet. When I find out how top delete Quicktime without affecting itunes I will.
But here's the best solution so far;
1. Right click on any AVI file
2. Select get info
3. Select open with and choose VLC
4. Click on the change All button below
5. Happy viewing
I've convinced at least 10 people to switch to mac's umpteen people I work with have purchased iphones because of me and how I've promoted the quality of Apple over their rivals..no more.