One of my users has also been unable to login. When I try to login using the sidebar login, it goes grey and then hangs. But it works when I use wp-login.php.
Details: Sidebar Login 2.4, WordPress 3.4.1
I am not using WP Super Cache as described above, although I am using W3 total Cache 0.9.2.4.
Any ideas?
http://www.ReadKnittingPatterns.com/rkp/
