Can't push subtree

As requested in answer to my stackoverflow (http://stackoverflow.com/questions/24637748/cant-push-subtree-using-sourcetree) post I'm posting this potential bug here.

Using a basic schema for git subtree I created 2 repository on Github: "project" and "framework" and made the followings:

• Clone "project" repository
• Add Subtree "framework" in a folder named "framework_dir"
• Navigate through "project/framework_dir" and create test.txt
• In the "project" working copy add test.txt to and commit it.

Pushing "project" gives the right result on the project repo. I then try to push this change to "framework" but it loops endlessly without giving any errors.

Same manipulation seems to work on the mac app on Mac OSX

Thanks.