I made a modification to the fbx export script for blender so that it would export constraints and I submitted it. They put the guy who wrote the script in change of my submission which made scene. He uploaded it to the blender svn repository and asked me to make a few modifications. I made the modifications that he requested and submitted it. He never said anything and reverted the plugin in the repository back to an older version...

I don't understand why he would do that... You can take a look at my submission here. I really need constraint information for my project and I was originally hosting the modified plugin on my site but I decided it was a necessary feature which is why I submitted it. I was really excited that he had included it because it would allow people to just model a character in blender, export it as an fbx and import it into my engine with all necessary data to limit rotations on bones. It pains me greatly that he removed it and he does not reply to my inquiry as to why he removed it. Any idea why he would do that?

If only Blender was using Git instead of SVN...

He just replied. Maybe he has a GameDev.net account! Anyway he said that he accidentally submitted the patch before and that he is now reviewing it. Crossing my fingers...