They don't even need to release a fix. I have been prompted to update several times in the past year, where I go through the install process (including having to uncheck the Ask box), only to get the message at the end that version x.y.x is already installed.

The updater is just plain buggy. Ed Bott mentioned the problems with limited user accounts, but I didn't see him mention the issue with jucheck ignoring the update settings:

http://superuser.com/questions/130961/how-to-stop-jucheck-fr...

I also had an XP system where the %appdata% environment variable somehow got deleted. This completely breaks the installer.