When /usr is mounted via NFS, there is a problem unmounting the NFS
Unmounting NFS filesystems. umount 2: Device or resource busy
umount: /usr: device is busy
Umounting NFS filesystems (retry): [OK]
(Hm, not too harmful I think, therefore decreasing importance)
There are lsof and fuser calls in netfs. Can you duplicate
these to the screen, so we can see *what* is holding it
(no, lsof isn't used, thanks god, because it's in /usr/sbin ... :) )
I used fuser -v -m /usr . It's anacron.
OK, assigning to anacron.
Fixed in -10