You discovered a bug in the engine, and you are sure that it is not a problem of your code? Just post it in here. Please read the bug posting guidelines first.
Yes, I've changed the pointer to become a real pointer now. But since I do not touch the .net wrapper it remained unchanged. Just change it, I guess someone will take care of this in SVN.
There is a patch tracker on the SourceForge project page where you can sent your patches to. Or just give some link here, or just put the code here (if it is not too much). If acceptable code exists there are enough people to commit your changes, you do not need write access.