Couple more things to try:
1) You mentioned you use a saved password. What if you try getting rid of the saved password, restart your browser, and just log in manually?
2) Change your password. Only use numbers and letters for now to see if a "special character" might be causing a problem. Normally those are recommended, but in this case it might be helpful to rule them out as a factor.
1) I've cleared out and re-saved the user ID and password 4 times now, with a browser restart between at least one of those attempts. Logging in manually works fine. Re-typing the password after getting a failed password message also works fine. It's just the full auto mode that won't work.
2) I currently don't use a special character. I have enough strong passwords at work with 12 character minimum, letter string max of 3 characters, special characters, caps and numbers all required, etc., etc., that I wanted my wacky life to be a little simpler. But I'll try playing around with the password. Use only lower case letters, lower & upper, lower and numbers, fewer total characters, and see if any of those work.