really weird file attributes

[rude bwoy]

s--sr---wx   1 27       12848    4294967295 Apr  2  1997 cache38053B90032022E

in my netscape/cache directory.

i can't delete, chown or chmod it.
error is Operation not permitted
 i ran fsck - didn't fix it either.

anybody have any clues what this is???

redhat 6.0 - Linux enterprise 2.2.5-15

thanks