Lion won't play .avi or .wmv correctly

I installed Lion yesterday, and suddenly Quicktime can't play the video part of .avi or .wmv files (it can still play the audio). I re-installed Flip4Mac but that didn't fix it. VLC still works, but now I can't view the files in Safari b/c Quicktime is responsible for playing them there.
Any advice on what to do?
Thanks!
Edit: I also re-installed Perian, no changes.

Normaly QuickTime doesn't support AVI or DVIX out of the box,
you need to install some plugins.
but as we all have done an upgrade to lion these plugins aren't compatible with LION ANYMORE.
they'll bring an update asap I suppose.
but in the mean time download this app: http://www.videolan.org/vlc/
It's called vlc player.
It's available on every platform, support airplay plugins, and every fileformat is support cause it's an open source project.
ps: it supports subtittles as you want and .MKV video's aswell.
it uses a lot less Memory then quicktime while watching a AVI movie or 720 p or above.

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<http://perian.org>
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<http://www.techisky.com/answers/does-perian-support-ac3-on-mountain-lion-10-8-ho w-to-fix.html#more-120>

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Lion won't play .avi or .wmv correctly

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