Has anyone seen that?
(yum upgrade):
---------------------------------------------
---> Downloading header for kernel-module-fuse-2.6.9-42.0.8.EL to pack into
transaction set.
ftp://linux4u.jinr.ru/pub/SL/4x/x86_64/errata/SL/RPMS/fuse/kernel-module-fuse-2.
6.9-42.0.8.EL-2.5.3-1.SL.x86_64.rpm: [Errno 4] IOError: [Errno ftp error] 550
fuse: No such file or directory
Trying other mirror.
ftp://ftp.scientificlinux.org/linux/scientific/4x/x86_64/errata/SL/RPMS/fuse/ker
nel-module-fuse-2.6.9-42.0.8.EL-2.5.3-1.SL.x86_64.rpm: [Errno 4] IOError: [Errno
ftp error] 550 Failed to change directory.
Trying other mirror.
Error: failure: fuse/kernel-module-fuse-2.6.9-42.0.8.EL-2.5.3-1.SL.x86_64.rpm
from sl-errata: [Errno 256] No more mirrors to try.
---------------------------------------------

It looks like, an additional /fuse/ comes from contrib dirs tree
and doesn't fit to the errata repository.

-- 
Best regards,
  Valery Mitsyn