The freeze issue will be fixed in the next version. And yeah, real is a messy format, while it seems to detect the streams just fine, i cannot get it to connect to the realmedia decoders. Silly things!
I'm not sure how pure audio formats behave right now. I do assume in some places that i have a video stream, or at least i think i do. I'll check that.
I'll try to fix some subtitle issues and push out a new version later today, so the freeze bug is no longer annoying everyone..