My upgrade took a while, but went fairly smoothly. The only problem I'm running into is that edit-this-page doesn't seem to work any longer.
It works for viewing pages, but when you try to save an edit you make:
Request Error
Database operation "0or1row" failed (exception NSDB, "Query was not a statement returning rows.")
ERROR: function etp__create_new_revision("unknown", "unknown", "unknown", "unknown") does not exist
HINT: No function matches the given name and argument types. You may need to add explicit type casts.
SQL:
select etp__create_new_revision('1096', 'co2', '292', '7716');
I'm on Postgres 7.4, and still on OpenACS 5.0