Sigh, I'll say it again. MKV's are simply ahead of their time. The reason people are having trouble with them is because they aren't made for the types of systems most people have. They're made for UBER-SUPER-HIGH-END-EXPENSIVE systems. That said, there is nothing wrong with MKV's and h.264, but the standard from AVI to MKV has happened way before it should have. Fansubbers need to realize this so that in the future, anime fans won't have this problem again.