big problem ....

[veroun]

hi
after
update my system ... upgrade -> dist-upgrade an
new initrd.img-2.6.24-21-generic
First
initrd.img-2.6.24-19-generic
after upgrade
initrd.img-2.6.24-21-generic

my problem is sudo reboot
error: umount local filesystems
this is big problem for my system and my work.
10x