But I don't get it... I've tested my German track with Harmy's final 2.0 workprint in Media Player Classic (which allows using an external file as the audio track) and it was in sync. How can it be it isn't anymore?

Edit: Sorry Harmy, you replied faster than I did ;) Yeah, maybe it happened during re-transcoding. I still have the German track in my Dropbox (although I'd like to remove that noise error at the end of the track first)... maybe we should just NOT transcode it to 192kbps? Does anybody have time to torrent the track, once I fixed it? But first we should check if my original file is in sync once included in the MKV...