Changelog for msgpack-devel-0.5.7-2.fc18.i686.rpm :
Fri Jul 20 14:00:00 2012 Fedora Release Engineering - 0.5.7-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild

Wed Feb 15 13:00:00 2012 Daiki Ueno - 0.5.7-1
- initial packaging for Fedora