I recently moved my (working) WordPress 3.1.3 installation to a new host (one.com). I have since then updated it to 3.1.4. The problem I'm having is that no settings in the network panel gets saved, even though WordPress tells me the settings are updated. When I change settings on an individual blog the setting is saved just fine. I activated debug mode and the only errors where some deprecated functions used in the theme.
As a consequence my users can't upload pictures (no media upload buttons can be selected to be shown), the max upload file size is 300 kB and, even though the site quota setting is 10 MB and deactivated, WordPress tells me I have 50 MB of space.
I also can't finish the update from 3.1.3 to 3.1.4, I've clicked the button to update all my network sites around ten times, each time it says it's done but it just won't take.
Weirdly enough it worked for a short while (hours maybe) yesterday evening, after several hours of unsuccessful troubleshooting. Then it stopped working again, and the host's support can't do anything.
Anyone have any idea what I can do for further troubleshooting or perhaps manually adjusting the settings in the database to get the blog working for my users? And where does the 50 MB quota come from?