Yo,
You can't replicate from lower versions to higher
versions, in
general. Only the reverse is safe. So if the master is 5.1, we can
assume all the slaves are probably (at least) 5.1.
Hmmm, I think that replication can be defined as (from)master(to)slave, so you can
replicate from lower versions to higher versions. Not opposite, unless you're using
trainwreck ;-)
Domas