The recent commit defines a minor mode with default key bindings. But I think it has conflicted with some other packages depending on nose.el.
The emacs manual says this:
Don't define C-c letter as a key in Lisp programs. Sequences consisting of C-c and a letter >(either upper or lower case) are reserved for users; they are the only sequences reserved >for users, so do not block them. Changing all the Emacs major modes to respect this convention was a lot of work; >abandoning this convention would make that work go to waste, and inconvenience users. >Please comply with it. http://www.gnu.org/software/emacs/manual/html_node/elisp/Key-Binding-Conventions.html
Besides, I think that the minor mode should be defined with more care. It should check if the user enables the mode or not. As it is, the minor mode is enabled regardless of the user's intention.