x86-64 needs the mcelog package installed by default, or we don't get any notification that a machine check exception has occured. Note: We never shipped this package before U2.
added to comps
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHEA-2006-0134.html