These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
calibre-0_6_19-3_fc11:F-12:calibre-0.6.19-3.fc11.src.rpm:1257068462 calibre-0_6_20-1_fc12:F-12:calibre-0.6.20-1.fc12.src.rpm:1257331145