I've completed the fix to my foul-up, and need to figure out how best to get it circulated. I've PM'ed Xavier in hopes we can try a little experiment. In short, I'm hoping that by replacing the existing t0rrent, only the changed packages would be downloaded. Depends if the change in the AC3 file resulted in an overall change in file size, video recompression, and VOB split points. If only a few bytes of a file changed, then a client should be smart enough to only download the changed packets.
If uploading works that way, the fix could theoretically be in circulation shortly. We'll see.