BeSweet CRC Error?

[AcidicChip]

I obtained a video that has 3 parts to it. The video codec is VidX and the audio codec is AC3. Here is what I have done...

1) Used AVI MPEG RM WMV Joiner to join all 3 video files into 1
2) Used Virtualdub ot extract the sound (AC3)
3) Used AC3Fix on the sound file (Cleaned it up)
4) Using BeSweet to convert the AC3 file to an MP3 file. (There is where I get the error)

Although the AC3Fix supposidly fixed the problems with the AC3 file (Even ran it again to double check and everything was fine), when converting from AC3 to MP3 format, I no longer get those write errors, however I get "E7: CRC error.". It still continues to convert after displaying that error. I am new to this AC3, and am not sure why I get that error, or if that error is ever worth stressing about. And if it is a critical problem that would afffect the quality of the sound, then how do I go about fixing it? 16 minutes into the audio, and I have 8 or so of those errors so far.

[AcidicChip]

Another note. I have stopped the conversion, and played the output MP3, and it sounds fine, so that is why I am wondering if those errors should be of any concern to me or not.