Unable to log in with FireFox after changing (external) password

When using external authentication and changing the password, it is then impossible to log in with FireFox (ver. 1.0.7).

To reproduce:

• We are using LDAP authentication.
• User has 'Remember my log in' set.
• User changes their Windows password, and then after logging on tries to access Jira, but is confronted with the attached screen (as would be expected).
• On clicking 'Log In', user is not taken to the new Log in screen, but instead left on the same dashboard - although the URL does change to: http://jira.cs.navman.com/jira/secure/Dashboard.jspa?os_destination=%2Fsecure%2FDashboard.jspa

Effectively it is now impossible for the user to log on using FireFox.