This is difficult to explain, but you can see an example here:
You’ll see that whenever @lincoln.ac.uk appears either in the text or as a mailto: link, the base URL plus a user’s email address is hyperlinked to the text.
You’ll see ‘http://blogs.lincoln.ac.uk/amakrzanowska%40lincoln.ac.uk/’ appearing as a link, but at no point have I created and inserted that link. Something is doing it automatically. If I delete that user, another user’s email address appears instead, so it’s not related to any user account.
Text referring to other domains, such as @lncd.org or @blah.org have no effect.
This happens with any theme on any site on the network and is resolved if I deactivate BuddyPress, which is why I’m posting this here.
Thanks for any advice. I’m at a loss to know what to do. If it makes any different, we’ve been running BuddyPress on this site since it was in Beta and noticed the problem a few days ago. Could it be a problem relating to recent changes in BuddyPress?