Debian Etch has been serving me well for a few years with wonderfully easy and infrequent maintenance.
However it’s at the end of its life
So I’ve upgraded to Lenny following these instructions
It was remarkably painless
One small problem with the mail system.
Errors were encountered while processing:
But scrolling upwards I got a more helpful error message
A package failed to install. Trying to recover:
Setting up exim4-config (4.69-9) …
DEBCONFsomethingDEBCONF found in exim configuration. This is most probably
caused by you upgrading to exim4 4.67-3 or later without accepting the
suggested conffile changes. Please read
/usr/share/doc/exim4-config/NEWS.Debian.gz for 4.67-2 and 4.67-4
So I purged exim, deleted the config files, reinstalled it and now everything seems good.