There is an intermittent issue with the comments. Some users are seeing other user details in the comment box. We tried a full reinstall, disabling plugins, flushing the cache, etc, but the issue persists.
We posted a support query in the WordPress forum, and have been hanging out in the IRC channel. No solutions so far.This appears to be a very rare, but old, WordPress issue dating to at least 2.3.3 (currently 3.0.4).
To protect everyone’s privacy, we edited the comments source to force the email field to be blank. Other usernames and websites may still pop up, but email addresses are protected.
We’ll continue to persue support at WordPress, and also ask our ISP if it could be a sessions issue.