Well, multiple times Kris has mentioned that Github is not being used for Marvin3...sooo I wouldn't expect any response from that. And....according to the sticky he has asked that you email him with bug reports......sooo, I'm not surprised you haven't heard a response from him.
Although, you could try semaphore from the top of Mt Everest if you think that will work better than the method he has expressly set up for that purpose...
