Boot stops at fsck

[Victor Munoz <vmunoz@macul.ciencias.uchile.cl>]

Hi, everyone. Last night I updated a lot of files in my sid system,
and today morning I cannot boot. Actually, it hangs after announcing
it will run fsck. I know that the partition was scheduled to a routine
check after 32 times (I receive a message before shutdown when that is
about to occur), however today the system says that it will run fsck
because the system was not cleanly mounted (which I do not understand,
because I shutdown the system from the command line last night, no
power failure or similar abnormal situation). Could this inconsistency
be related to my problem?

Anyway, is it possible to bypass the fsck at boot time? I am able to
reach the boot prompt by typing "c" at the boot menu, but beyond that
I don't know what to do. Googling has not helped me as it leads me to
other issues with grub and fsck which do not seem to give me ideas I
can apply to my problem.

I think that if I can at least skip the check, I could do some work,
check the filesystem manually and try to go ahead somehow.

Thanks in advance for any help!

Victor