You might want to read this thread:

Logging into UT now ignores the enter key Thread #1310234 Message #1310234


>Just recently, I've had a "problem" logging on to the UT. I type my user name, press Tab, type my password, then hit Enter. Always worked before. Now I get a beep and it won't perform the default action of form submission. I have to click the Login button. Not too big deal of a deal, but just kind of irritating. Anyone else seeing this? Anyone know why there's been a change?
>
>Russell Campbell