rpmquery --requires kernel-image-std26-up ... modutils >= 2.4.27 mkinitrd >= 1:2.9.1-alt1 ... I think that kernel must conflicts with older version of modutils and mkinitrd and with missed old _startup_ package. With old one system won't correctly startup.
IMHO достаточно только REQUIRES. startup я уже поправил, в следующей сборке будет.