filesystems not properly unmounted

[Maxi Combina]

Hello, I am running freebsd 5.4, and every time I reboot, I get a
mesasge when the kernel is mounting the filesystems. It says that the
fs were not properly unmounted, and must chek them. Them main concern
is with my root partition. I also have en ext3 partition (which I
mount as ext2), and the kernel also complains about this ext3
partition.
The root partition is automatically checked, but the ext2 partition
not! I have to manually run fsck.ext2 and then reboot again...
I am _sure_ that I have rebooted in the right way. Well, at least with
`reboot' and `halt'. May be this is not the right way? Am I missing
something?

Thanks in advance,
Maxi