Is it absolutely necessary to have the same versions of Postgres on both 
the master and slave?  Point is, we are currently running 7.4.16 on the 
machines I plan to replicate, but thought I'd go with the lastest 7.4 
version (18).  My ignorant assumption is that if you're going to have a 
mis-match in versions, it's best to have the slave newer then the master.

-- 
Until later, Geoffrey

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety.
  - Benjamin Franklin