I have the same problem as bearqst: did an automatic upgrade, got
"An automated WordPress update has failed to complete - please attempt the update again now."
So I went ran the auto update again. Still getting
"An automated WordPress update has failed to complete - please attempt the update again now."
Then I went through the manual download/upload process, and pulled up the setup.php screen. Which told me that 3.0 had already been installed.
Back to the dashboard, where
"An automated WordPress update has failed to complete - please attempt the update again now."
is still hanging out. Any suggestions much appreciated.