Tortoisehg opens console windows when working with subrepos. How do I stop him?

I have a mercury repo with a git sub-revolution. Whenever I open TortoiseHG, several (5-10) console windows open and close quickly (in less than 1 second). I would like to make the turtle work without showing these windows.

My best guide so far is this old thread . This is for SVN, but it seems to be on the right track.

I'm fine with python scripting changes, although I'd rather get it to work without resorting to this.

I am using msysgit with openssh on windows.