I've been out of the country for several weeks, and now that I'm back I've tried to open the admin pages of my small multi-site install running WP 3.2.1. The root site is
and the subsites (using subfolders) are
It was my impression that all sites were working normally when I left. (I may be wrong. I may have updated something and not checked to be sure all was well before I left in late November.)
Now, on my return, I am unable to open the admin panel for any of the sites, or for the super-admin. All attempts, in all sites, redirect me to the home page of the root site. But the basic pages and posts for all sites work normally. Some generated pages, such as category pages, do not work and generate a 404 page.
I have de-activated all plugins (by renaming my plug-in folder), but the problem persists. The three sites use different themes, so I don't think this is a theme issue. I have tried deleting various parts of my htaccess and wp-cofig files, but these changes either break the site or do not resolve the problem. Nothing in those files looks in any way abnormal to me, so I don't think those files, at any rate, have been hacked.
I am thinking that the symptom -- always redirecting to the home page of the root site -- must be clue to what the problem is. But I am not tech-savvy enough to think it through to a solution. Can anyone help??
Absent any suggestions of what the problem might be, I am contemplating a manual upgrade to version 3.3 to see if that solves the problem. Is this a bad idea (I do have a backup of the site)?