In the '[DISCUSS] Bugs-only strictness for bugfix releases' thread, Mike Drob brought up the concern that the definitions of "bugs", "improvements" and "new features" may be ill-defined.
I provided one explanation for how I was interpreting those in that thread, which I won't duplicate here, for brevity. JIRA has some views also, which I think are similar to what I've outlined: https://confluence.atlassian.com/display/DEV/JIRA+usage+guidelines -- Christopher L Tubbs II http://gravatar.com/ctubbsii
