I have had no problems with either on leopard. Do you know what the mkv files that crashed contained? were they h.264?
Thats strange, no problems here
Intel (macbook)
If you want to play a .mkv file try using this program. It's fast , it's FREE. and free is good.
http://www.versiontracker.com/dyn/moreinfo/macosx/16623
Err, that is exactly the program I recommended in my first post of this thread.
Im at a loss. Does one exist? .mkv to anything playable will be fine.