Many Japanese RedHat 5.x Users using
libwcsmbs package, this package adds wcstombs function
to glibc 2.0.x .
Now , RedHat 6.x and Raw Hide handle glibc 2.1.x,
that already have wcstombs function.
so, when Upgrade system (have libwcsmbs installed)
to RedHat 6.x (or RawHide) then system don't start
unless reboot from rescue disk and delete /etc/ld.so.preload
To solve this problem.
Please add just two line to glibc-2.1.x SPEC file.
That is not a package shipped by Red Hat and we can not change our
packages to accomodate changes made by contributed RPMs. Especially
with glibc, which is very sensitive to any change in the list of
provides and/or obsoletes.