I had a very pleasant bug-filing experience a few days ago. Whilst hacking chocolate-doom, I noticed that exuberant ctags would recurse into _darcs directories: this isn't useful. Indeed ctags already maintains a list of exclude-patterns for version control directories such as CVS.

Thanks to apt-get source reportbug, it took less than 5 minutes to patch the program and file the patch. I did so at 19:48:19 UTC.

The maintainer applied the patch, topped up the exclusion list for other revision control systems (.svn, {arch}, .arch-ids, .bzr, .git) and released a new package at 11:17:13 UTC the following day: only 15.5 hours later.