Hittade lösningen:
1. Make sure buffer underrun prevention is turned on. In the Recording Settings sheet, Advanced tab, make sure to check "Buffer Underrun Prevention"
2. In the Recording Settings sheet, Basic tab, make sure to choose "1x" as the Write Speed.
3. Make sure other background processes (copy files, playing music, etc) is turned off.
4. Try using a different brand of media. Brand name media is usually the best bet.