Hi Alessandro, The FSF requires that all contributors sign a form agreeing to assign their copyright to the FSF before the code can get into Emacs. The FSF copyright clerk, Mr. Robertson, said that any code contribution 15 lines or more might be copyright-significant. In the thread I just forwarded to the list, you can see that he said that. I think we should get contributors to agree that they will send a copyright assignment form to the FSF when, hopefully, Vimpulse will get into Emacs. Otherwise, if you ask a contributor to assign copyright and they don't agree, it could be a big headache. I assume you would have to delete the code they contributed plus all code that requires the deleted code. I propose this. 1. I edit vimpulse.el saying how to submit patches: a) attach a patch to Trac b) mention that you are willing to assign copyright to the GNU Project if we ask you to later 2. If someone submits a patch 15 lines or more and forgot to do 1b), you ask them, and if they don't agree, you ignore the patch. You are maintainer, so this is only a suggestion to you. What do you think? By the way, I have asked at http://thread.gmane.org/gmane.emacs.devel/108538 if Vimpulse can be shipped with Emacs. We will see what they say. -Jason