From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5) Gecko/20031007 Description of problem: This component, 'glibc-headers' shows up in Fedora 2 (maybe earlier) but it's not in the 'component list' in RedHat Bugzilla.
Bugzilla farms it's component names from the source rpms of the product. In this case glibc-headers' source rpm is 'glibc'. Please file your report against that component instead.