Hey guy I have successfully upgraded one of my WPMU sites to wordpress 3.0.1.
Now the trouble is when U try to update network, I have 16,000 blogs and the upgrade errors out after a while.
Warning! Problem updating . Your server may not be able to connect to sites running on it. Error message: A valid URL was not provided.
Not really sure what the issue is, but I would like to upgrade them all.