I think I too have been hit by this bug.
Unluckily, for me none of the kernel images that I have (2.6.24,
2.6.23, 2.6.22-3-686) work. Also I have a backup initrd of 2.6.24 and
.23, but they too don't work.
So I'm now stuck up with an unbootable laptop.
Currently I'm setting up a USB Stick to boot and see what really is
the problem. But I believe it is not a password problem because, a
user who has been running the encrypted root device for 6+ months,
cannot forget the password one fine day.
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
- From: "Ritesh Raj Sarraf" <firstname.lastname@example.org>