...cause I can't find it elsewhere on the web. In the login page in lion, you can't tap to click and enter your password. I noticed this because my air trackpad (fiddly rubbish things that seem to always go bad on me) doesn't click anymore, so I just tap, cause I 've not gotten around to taking advantage of my applecare. So I remained stuck in the login page until I connected the mighty mouse and then presto. (as an aside for some bs reason apple's trackpad - the external one - does not connect on the login screen to the air... as far as I can tell, since this is not verified that well). Same on my imac and apple's external trackpad, tap ad infinitum and nothing happens, click and there you go. So for anyone who has the same issue, it's a bug, or a "bug", depending on your definition.