Might be a good idea to clear out your Cookies, also. Had a similar problem a while back, it picked up a bad login and kept trying to use it, giving me the same error. Once I cleared Cookies I was able to sign in again.
Posted from my CrackBerry at wapforums.crackberry.com
Not having that problem but it will not save my setting to NOT show offline contacts and or groups. I don't need to see who is not online as I all ready know that if they are not showing as online...............duh.