Perhaps a variant of ORG-217.

I was on the jboss.org home page, clicked the "Login" link, submitted the form and ended up on this random page:

http://community.jboss.org/message/434125

In case it's relevant, the browser tab I was on had an unpublished wiki page on it. I had returned to my desk this AM after not touching the browser overnight. I didn't want to log in from that unpublished page (scared of losing the content for some reason) so I clicked on the JBoss Community logo at the top to go to the home page. Then clicked on the "Login" link.