One of my admins can't access the admin page, the only thing that shows is "'" and absolutely nothing else. The source code is perfectly normal except that there is a "'" at the very beginning, which really shouldn't be there.
He has also had problems with getting in to our admin forum, which was fixed when I demoted and gave him admin privs again. From what I can see group 1 is among his groups, and his status is Administrator. It also works just fine if I become his user. He says this happens regardless of how many times he removes his cookies, he has even made a complete reinstall of his system between trying. He isn't using a firewall or anything like that either.
Has anyone seen this happening? Any ideas?
