I've just upgraded one of the site from v1.2.1 to v1.3.3. However, there are too many issues with the upgrade, from plugins not working, categories disappearing, and now files not showing up.
I was wondering if the downgrade procedure is similar to that of upgrade instructions? Basically, follow the info. at http://codex.wordpress.org/Upgrading_WPMU but use 1.2.1. I need for the site to function as before and perhaps upgrade or new installation at a later time.
Thank you for your help.