Alright. I tried upgrading my installation to 2.8.1...
Did it from the backend. Showed that the upgrade was successful. But the message 'WordPress MU 2.8.1 is available! Please update.' continued to remain in the backend.
I also uploaded manually by uploading all files manually.
Still I get the message in the backend:
'WordPress MU 2.8.1 is available! Please update.'
the footer shows:
Thank you for creating with WordPress MU 2.8.1
but it also shows:
Get Version 2.8.1
What am I doing wrong?
The code of the blog pages also show:
<meta name="generator" content="WordPress 2.8.1" /> <!-- leave this for stats -->