Copyright without years
A blog post about why curl switched away from showing years in copyright statements within the project.
Wrong license · Issue #16 · mdmintz/pynose
This looks like a really great example of not now to handle the licnece of a fork, and also how not to handle the feedback you get when you make such a change.
Various Licenses and Comments about Them - GNU Project - Free Software Foundation
The Free Software Foundation's take on various software licences, both Free and non-Free.