Hello MacRumors, I have an mid-2012 MBA since just over a week. I installed Perian to view .mkv files in Divx player and it worked just fine. I now updated to ML and I can't play audio anymore in Divx player. I have a message that I need to install a Dolby AC3 audio codec. I reinstalled Perian but this did not solve the problem. Did anybody else encounter this problem or knows how to solve this? Thanks in advance!