Shit sucks, enjoy having your video break every time Apple updates QuickTime. Perian devels are gigantic homosexuals who force people to compile from svn.
Use mplayer. Shove -ass -embeddedfonts -fontconfig -sid 0 -alang jpn into Preferences > Miscellaneous > Advanced Settings and you're done, about as good as CCCP + MPC.
Sadly the place where you can get mplayer builds for OS X seems to be down at the moment:http://haque.net/software/mplayer/mplayerosx/builds/
so you'll have to rely on a random guy at AnimeSuki for the download:http://forums.animesuki.com/showthread.php?t=31445