Hello!
we just noticed that in 6.4 the yum group "core" (defined in "comps-sl6-x86_64.xml" file)
lists a rpm "yum-conf-sl6x" which conflicts with the "sl-release" rpm.
yum-conf-sl6x creates a file sl6x.repo and sl-release creates the file "sl.repo".
The sl6x.repo references the sl6x rpms, the sl.repo
references the sl64 rpms.
IMHO the yum-conf-sl6x shouldn't be in the "core" group.
best regards.
sven