LUKS-encrypted root LVM volume won't take password after kernel upgrade (Hardy)

[Guest]

Running Hardy, using the encrypted root-volume from the alternate install disk.
Kernel 2.6.24-16 (the one I installed with in April) works fine. Takes the password, mounts, boots.
Upgrades -17, -18, and -19, it gets as far as asking for the password...when I enter it, it just blinks and asks again, until I've entered it enough times for it to decide I'm trying to break in.
The /boot/grub/menu.lst has the same options after each kernel entry (root=/dev/mapper/anubis-root ro quiet splash).
The /etc/crypttab has the right UUID and device.
I've been searching the forums (ubuntu, kubuntu, debian, google, luks) for 3 days and gotten nowhere.
Can someone give me a clue?

Thank you
Vengeance

[Guest]

Re: LUKS-encrypted root LVM volume won't take password after kernel upgrade (Hardy)

Should I take it from the deafening silence that no one can help me, and I should do a good backup, then reinstall without the crypto?