Updated Perian codec pack for SL
 

This is a custom build of Perian optimized for SSE3 machines.
It also uses the latest SVN build of ffmpeg
I also included libebml 1.0 and libmatroska 1.0 (for better .mkv support)
On my machine (low end atom N280) it even plays high def (720p) movies fluent (.mkv movies)

Download:
http://rapidshare.com/files/41841006...fPane.zip.html

awesome, thank you