@togg: I remember, nearly a year ago I recorded a sync test when we started implementing audio. I had one clip where audio was 1fps earlier than video. But: that means when syncing it correctly, there is no audio for the first frame - or we would have to cut away the first frame. There is only a very little more audio than video in a MLV. We decided to sync it by using the timecode (therefor we had to cut a very very little in front and in the rear of the audio channel, if I remember right, or only in the rear?!). Nobody really knows, on which position the audio is more correct than using the timecode... here a screenshot from my clip, it is the same with yours?

@bouncyball: you remember the little book sync test?! 
Here I am again. I've cutted an MLV and tested it, as you can see the audio is offsync by minus 1.5 / 2 frames. I feel like it is a stable offset, it is not drammatic but for me slow things down especially if you're in a shooting situation where you doesn't have a clap, you have to know the issue beforehand to not make a mistake. 2 frames out of sync is a lot.
http://www.mediafire.com/file/ypy6y33172cmwu1/M02-0435.MLV/fileAlso I've tried the new version! I'm happy that multithread was implemented but for now I can't see any speed improvement in export, maybe even 1mb slower, which is kind of weird. it stays to 18MB/s on write, I've tested it with multiple read and write locations. I'm using a 2012 rmbp with an i7 and dedicated gpu.
Also, a super important thing for me would be to have the option stick when closing and opening the app. I'm thinking about the vertical stripes correction and hot pixel correction.