F18 Can't install gcc

When I do:

yum install gcc

I get this error output and gcc fails to install:

Error: Package: glibc-2.16-24.fc18.i686 (fedora)
Requires: glibc-common = 2.16-24.fc18
Removing: glibc-common-2.16-24.fc18.x86_64 (@koji-override-0/$releasever)
glibc-common = 2.16-24.fc18
Updated By: glibc-common-2.16-30.fc18.x86_64 (updates)
glibc-common = 2.16-30.fc18
Removing: glibc-common-2.16-28.fc18.x86_64 (installed)
glibc-common = 2.16-28.fc18
Updated By: glibc-common-2.16-30.fc18.x86_64 (updates)
glibc-common = 2.16-30.fc18

How do I get gcc installed?