Mine

19:09:50 : Yum Config Setup
19:09:51 : Yum Version : 3.2.7
19:09:51 : GUI Setup Completed
19:09:51 : Setup Yum : Transaction Set
19:09:52 : Setup Yum : RPM Db.
19:09:52 : Setup Yum : Repositories.
19:09:52 : Setup Yum : Package Sacks
19:09:52 : Setup Yum : Updates
19:09:56 : Loaded update Metadata from updates 
19:09:56 : Setup Yum : Groups
19:09:58 : Failure getting http://mirror.atrpms.net/fedora/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:09:58 :   --> [Errno -1] Metadata file does not match checksum
19:09:58 : Trying other mirror.
19:10:00 : Failure getting http://fedora.kiewel-online.de/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:00 :   --> [Errno -1] Metadata file does not match checksum
19:10:00 : Trying other mirror.
19:10:02 : Failure getting http://fedora.tu-chemnitz.de/pub/linux/fedora/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:02 :   --> [Errno -1] Metadata file does not match checksum
19:10:02 : Trying other mirror.
19:10:04 : Failure getting http://ftp.stw-bonn.de/pub/fedora/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:04 :   --> [Errno -1] Metadata file does not match checksum
19:10:04 : Trying other mirror.
19:10:06 : Failure getting http://mirror.fraunhofer.de/download.fedora.redhat.com/fedora/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:06 :   --> [Errno -1] Metadata file does not match checksum
19:10:06 : Trying other mirror.
19:10:08 : Failure getting http://www.jur-linux.org/download/fedora/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:08 :   --> [Errno -1] Metadata file does not match checksum
19:10:08 : Trying other mirror.
19:10:10 : Failure getting http://ftp.uni-bayreuth.de/linux/fedora/linux/updates/7/x86_64/repodata/comps-f7.xml: 
19:10:10 :   --> [Errno -1] Metadata file does not match checksum
19:10:10 : Trying other mirror.
19:10:38 : failure: repodata/comps-f7.xml from updates: [Errno 256] No more mirrors to try.