fsck: Duplicate blocks error

[J Horacio MG <homega@vlc.servicom.es>]

Hi,

I just had this filesystem check error while booting:

Duplicate blocks found ... invoking duplicate block passes

...

File /lib/libungif.so.3.0.0 (inode #12302, mod time Wed Jul 8 02:36:34
1998) has 2 duplicate block(s), shared with 2 file(s):

	/bin/skill (inode #8284, mod time Fri Oct 30 05:06:54 1998)
	/bin/vmstat (inode #8281, mod time Fri Oct 30 05:06:56 1998)

Clone duplicate/bad blocks<y>?

and a few other questions I answer as defaulted (<y>).  Then, I try to
make a reboot (ctrl+alt+del), but it won't and just gives me the
following:

BUG IN DYNAMIC LINKER ld.so: ../sysdeps/i386/dl-machine.h: 307:
elf_machine_lazy_rel: Assertion `! "unexpected PLT reloc type"' failed!

and it hangs there, and gives me the same message everytime I try to
reboot, so finally have to resort to reboot button.  Now the system
seems to be working ok, just concerned.

Only unusual thing I did prior to this is attempting to create a new
user with not so good results:  the new user's home directory was
created, and so is the line in /etc/passwd:

usermaria:x:1001:100::/home/usermaria:/bin/bash

but I cannot log in as the new user!

TIA
-- 
Horacio
homega@vlc.servicom.es
Valencia - ESPAÑA