I have noticed that when I upload mp3 files at 192 kbps into DropBox that the file gets shortened. The longer the file, the more it gets shortened. I do not have this problem when uploading mp3's at 128kbps and below. We are talking about 1 second per 10 minutes of audio. The files aren't time compressed. When others open the file, the end is cut off. The easy answer is to add a few seconds of dead space, but I feel I shouldn't have to do this.