Hi,
The update process went smoothly, but after some testing on the site I found out that I couldn't save any pages, links or Post. After hitting the save button I get the following message:
Are you sure you want to do this?
Please try again.
The 'Please try again' is a link that sends you back to the page where you came from.
The auto save option is working and quick edit functions to. So it's not in the save process.
I restored the backup on the server and started to try local. I deleted all plug-in and mu-plugins and retried the upgrade. Again the same problem...
I'm now using version WordPress MU 2.8.6. And I used the automatic update function.
Anyone else having this problem? Don't really know what next to do?
Thanks in advance,
Pieter