I've made three music videos for my band so far and had no problems. On the fourth I'm having a problem with the end of the song. The last 10 secs of audio are chopped off. Reloading the audio or removing the audio from memory fixes it for 1 or two plays but then it breaks again.
The only difference I can see is the bitrate. The problematic song is 272kbps (very nonstandard!) while the other one is 320kbps (very standard). Perhaps there was some kind of error when the problematic one was created?