I am seeing the same exact error message on an install of the Class Blogs plugin.
WP 3.5.1 multi-site
RedHat Enterprise Linux 6
Apache 2.0
I have not had a chance to test this on a single user install or a standard out of box install.
Plugins active:
Akismet
Login Security Solution
Multisite User Management
nRelate Related Content
Ultimate TinyMCE
Would appreciate any follow up as this sounds like a perfect system for my class needs.
