Comment 2 for bug 529310

Thank you for your report.

(Current) versions of uscan are able to 'unmangle' the version. he man page contains an example how to filter '.dfsg' from a version, adapting it to '+dfsg' is not too hard I suppose.
You should take a look at the 'per-site options' and specifically to the 'uversionmangle' option

Please update this report, whether this solves your problem/wish or not.