Doh! Thanks for that Adam! The version info in the docs was indeed staring me in the face <blush>
An MP2 upgrade is out of the question - Debian Stable is 2.0.2 for the next few years (historically, 3 year cycle, Stable was first released Aug-07), Testing and Unstable currently have MP2.0.3_5, but these don't get security patched, and worse require a different libc6 chain, (2.3.5 vs 2.7 [ia64]) that has not been fully soak tested for interaction stability.
Stable prod servers are a high priority for us, so its MP2.02 for the next few years, sigh. At least we are not still stuck on a non-working (pre-rename) 1.99-21 as we were until Aug 07!
Thanks again! Jeff
