If you mis-enter credentials in the login form at Apple’s MobileMe site, it will shake and wipe out the incorrect password to help reinforce the fact that you goofed up - just like the login form on a Mac.

If you mis-enter credentials in the login form at Apple’s MobileMe site, it will shake and wipe out the incorrect password to help reinforce the fact that you goofed up - just like the login form on a Mac.