I had a couple of multisite installs working perfectly under 3.1. The sites contained sub-sites, a few of which were mapped against their own domain names. For each install, there was a single page where I could view all these sub-sites, and where I could choose to view, edit, suspend, trash or go to the dashboard of that sub-site.
After upgrading to 3.1.1:
(1) I could no longer find this (described above) page.
(2) The PLUGINS > ADD NEW link is gone. Moreover, there is no clickable Delete option anymore for each plugin. This means I now have to FTP to upload new/remove plugins, instead of doing these within the WP install.
(3) The link to enable a theme for the whole network (which appears when you upload a new theme) is also gone.
Anybody else encountered this problem and how did you solve it?