Hi Kevin,
1. I think 4.5 has some compat problems with PG 7.2.x, OpenACS 4.6 should be fine with PG 7.2.x.
2. You can use this to report bugs
http://sdm.openacs.org/sdm/one-package.tcl?package_id=9
The sluggishness if there is one is normally caused by a unoptimized query. Although normally this does not happen on relatively small sites. The tcl code should not be an issue.
Notes tutorial is a bit out of date, and we are trying to see if we can make something a bit more dated and appropriate. Anyway we are all volunteers and much help is needed.
BTW, welcome to OpenACS.
