At line 1301 (in 0.6.11), i is incremented before the comment is printed rather than after. This results in the first comment being comment #1, rather than comment #0 as Bugzilla treats it in internal links and such. If we using pybugz's numbering, we will refer to the wrong comment number when mentioning it.
that's a good point. I deliberately numbered the comments starting from 1, but I probably should of just started it from 0 as you say, otherwise it wouldn't match up with the URLs. this is fixed in the SVN version.
Fixed in svn.