I have the same problem and it makes me feel weird after reading your reply.
why is it not working after the update while its working fine before the update?
i can watch .mkv video complete with the audio before and after the update, i tried to continue watching the same video and it doesnt have any sound now.
this happen after i update the app from app store today. It worked fine yesterday night.
this must be bug or error occured , please release some update to fix this.
