After all the recent cleanup work on the theora-mmx branch, I've merged the simd optimizations from there into trunk. Please give this a try and make sure it works on your system. After we clean up any build issues we'll release this as libtheora-1.0alpha6. I've removed the now obsolete theora-mmx branch; if you have outstanding work against that try 'svn switch http://svn.xiph.org/trunk/theora'. That should point your working copy and the new location, at least with svn 1.3. With earlier versions you may need to use the more complicated --old and --new syntax. Special thanks to Wim for writing this in the first place, Dan Lenski for getting things working on x86_64, and Mike Smith for general prodding and grunt work. -r