Please visit the FlixelCommunity branch of Flixel:
Flixel Community was born as a healthy fork of Flixel. It is not supposed to replace Flixel or to compete with it, but to co-exist. Adam (Flixel's author) encouraged us to grow a community version and maintain it to our heart's content, even offering it as an alternative to Flixel.
That version of Flixel contains all the bug fixes in my fork, plus many, many more!
Contributors are always welcome!
My personal fork of Flixel is only sticking around so my old pull requests don't disappear (plus there are a few old changes that I still want to keep track of for a bit longer).