I'm just mixing for YouTube and Facebook pre-recorded videos, not streaming. I had trouble this week mixing 3 audio files (mp3 and m4a)--each finished video had several glitches in it. By glitches, I mean the screen rapidly flickered. The audio wasn't affected. I remixed all of them, but the glitches reappeared in the 2nd and 3rd remixes in exactly the same places. I have never had this problem with audio or any other files. Has anyone else had this problem, and if so, is there a fix? I was using .59 but haven't tried it using the .60 update.