I have a wordpress MU (3.0.1) setup (upgraded from 2.9.2).
It runs on 4 instances, load balanced, and all 4 connect to same database.
Now, when only one instance is running, it is working fine...
When I run multiple instances, I am not able to trash or undo trash or even do any change in settings .. I get this message:
Are you sure you want to do this? Please try again.
the URL when this occurs is
What could be the issue and how to fix it?