This page tracks possible improvements to Fedora's security based on restricted POSIX capabilities. See https://fedoraproject.org/wiki/Features/LowerProcessCapabilities , https://fedoraproject.org/wiki/Features/ProtectingBinariesUsingCapabilities for rationale.
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle. Changing version to '13'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
I don't plan to implement these changes any more - in particular because the file owner can change the permissions without CAP_DAC_OVERRIDE.