First off, on the off chance anyone was unable to contact their xbox like me, make sure you computer is not DMZ'ed. Technically, its not on the same network.
I'm using Sharks codec pack, and mkvs, of whatever type, play perfectly in Windows 7 RC. However, they barely work when I try to steam them to my Xbox 360 which is wired to the same router. Only MKVs have this problem, other formats play perfectly fine.
The MKV will either stutter terribly, look horrible, or not even play. I also can't pause or fast-forward because it will bug out MC, forcing me to restart it.
Has anyone gotten MKVs, and movies in general, to work well with the XBOX 360? I would like to know what you did.