Ubuntuforums.org has been hacked and all of the email addresses, usernames and passwords have been taken. there are 1.8 million users on that forum :|
from the announcement:
- There has been a security breach on the Ubuntu Forums. The Canonical IS team is working hard as we speak to restore normal operations. This page will be updated regularly with progress reports.
- Unfortunately the attackers have gotten every user’s local username, password, and email address from the Ubuntu Forums database.
- The passwords are not stored in plain text. However, if you were using the same password as your Ubuntu Forums one on another service (such as email), you are strongly encouraged to change the password on the other service ASAP.
- Ubuntu One, Launchpad and other Ubuntu/Canonical services are NOT affected by the breach.
here is a thread on the ubuntu discourse about some of the symptoms:
and an article on zdnet: