No, the MySQL password just has alphanumeric characters in it.
The thing that puzzles me the most about this being a problem with the user accessing the database, is that it was working. Web access via Horde, and as POP3/IMAP server was working. To the best of my knowledge nothing changed between then, and my attempting to use it the next day, and encountering the above errors. But then they always famous last words "nothing has changed". Obviously something has to cause this problem.
Your help an suggestions so far are appreciated.