I used to contribute to JBoss until I had this happen to me.
I wrote the very first JAAS tutorial and example code for JBoss. It was promptly stolen, the other guy's name added, mine removed and then published to the JBoss community.
I called the plagiarist, Scott Stark, out, he denied it.
I pointed out all "his" code was identical to mine including variable names, he denied it, claiming the variable names were "obvious".
I pointed out this "his" examples contained exactly the same errors as mine did, finally he admitted he'd stolen my work and added my name as a contributor.
That plus Mark Fleury's attitude drove me away and I decided never to contribute to JBoss again.