I've been trying to get Revision control to work on my testsetup of WP3.1 on WAMP. As soon as I change the default number of revisions, the WP admin pages become unstable: timeouts, css code not loaded properly, etc. When I disable the plugin, everything's okay again. I'm building a child theme on the 2010-5 child theme of 2010. It is possible that the problem stems from this customization, or (more likely) from trying to get it to work on WAMP. I will try the plugin on my live website and report those findings as well.