>As a general rule, you can pretty much backup any client version
>to any server version.

That used to be true, and as such was comforting and easy to remember.
But as of 4.1 that rule no longer works, alas.  Always refer to what
the doc. says to assure that the combo is supported.  If the combo is
not documented as working, it might work - up to a point.
  Richard Sims, BU