I got a little further on my attempts to run backups via the new
install. It appears to backup using the new binary except that the changes to
/etc/inetd.conf seem to have caused some of the backups not to work.
For some reason, amcheck is reporting that there is no .amanda-exclude
file on each entry in the amanda disklist file (for a certain machine
at least). That machine is indeed up and that file doesn't exist there,
but it didn't when I was running 2.4.2p2-4 either and I never got these
errors. Did something significant change between those versions in this
area?

The output from the dump last night indicated that these backups had failed. 

ERROR: morimoto: [Can't open exclude file 
'/net/morimoto/client/.amanda-exclude': No such file or directory]
ERROR: morimoto: [Can't open exclude file
'/net/morimoto/project/gelato/.amanda-exclude': No such file or
directory]
ERROR: morimoto: [Can't open exclude file
'/net/morimoto/project/redhat/redhat-updates/.amanda-exclude': No such
file or directory]

And more. However some on a different filesystem did succeed. What am I
missing here?

Vicki