This is a weird problem. A couple of weeks ago, Subler was working perfectly. Now it is incapable to converting multi-channel AC3 audio to 2-channel Prologic II AAC. This is occurring with the latest version (0.2.3) all the way back to version 0.1.8. If I convert the AC3 to stereo, then it works fine. The failed AAC tracks emit no sound, are very short (several seconds), and a weird bitrate (2250 bps). I don't understand how Subler can be working one week and then suddenly be unable to convert to Prologic II AAC. Has anyone else had this problem using Subler? BTW, this is under OS X 10.6.8.