I installed Maintenance Mode plugin on my wpmu installation. Seemed to properly block access, but caused me to go in circles trying to edit posts and pages. I deleted it and installed the privacy options plugin which works, but I'm getting what appears to be residual behavior from Maintenance Mode. I can access the back end, create new posts, access all sorts of settings, but every time I try to edit an existing post or page, I'm asked to login again. Logging in takes me to back to dashboard, and if I try to edit a post or page, I get the login again. Rinse and repeat.
I don't see any .maintenance files in my directory, and I've cleared the cache and double-checked to ensure that I've fully deleted the plugin. Suggestions?