i run successfully the update from WPMU to WP 3.3.1.
Everything run fine and the most run without problems.
Only 4 blogs have problems. It's not possible to run "Update Network". All 4 blogs start with blog.DOMAINNAME. And if i press "Update Network" it go to DOMAINNAME/wp-admin/network/upgrade.php and not blog.DOMAINNAME/wp-admin/network/upgrade.php. The same problem if i open directly blog.DOMAINNAME/wp-admin/network/upgrade.php it opens DOMAINNAME/wp-admin/network/upgrade.php.
I think it's a bug in the script of "Update Nework".
Does anybody know a solution to resolve this problem?