"Dear SourceForge User,
The SourceForge team takes security very seriously. This week, one of our systems was compromised. We have promptly taken the necessary steps to correct this situation.
You have been contacted, because according to our log files, you have used SourceForge during the past week and may have used the system that was compromised. In order to complete the security fix, we are asking all users who used the system to change their password immediately. We've reset your password to a randomly generated string. "
Here's where to go if you think your account might have been compromised.