Nanook Smith: have you considered that the problem might be on your end in this case? After all, you seem to be entering a wrong handle or password.
If you copy/paste your password, make sure you don't copy any additional whitespaces before or after the password.
If you type it manually, make sure you type it correctly, some fonts display 1 (number one) and l (letter L) in a similar way.
In any case, make sure the password field is completely empty before entering your password.
If that still fails, try using the Lost Password feature to get a new password.
Don Frankie: have you tried Firefox? Additionally, do you get any message when trying to log in?