Thanks for logs and for nzb-file. I'v got the same errors with that nzb-file.
There were actually two bugs: the first caused decoding-errors and reporting of CRC-Errors. It was because the articles contains the trailing text after the binary data - very uncommon case, never see that before.
The second bug caused seg.faults after the failure of all articles.
Both bugs were fixed.
Please try the latest version from svn.