Hi,
I just tried upgrading to the latest version of s2Member. I followed the instructions given by Jason Caldwell for Manual installation. When I go to activate, I get the message, "You need Wordpress v3.0+ to use S2Member".
I am using WPMU 3.0.1. I had a previous version of S2Member functioning correctly before.
Any ideas on what's going wrong? I have tried the simple "activate" button as well as the "activate s2member sitewide". Same results.