After a hell and back and hell and hell and back and hell and back and hell and back again morning trying to update a Zope 2.3.3 site (as ZEO client) to be a Zope 2.5.1 site (including installation of some new products), I finally re-discovered the magic of FORCE_PRODUCT_LOAD environment variable. The only reason I even remembered this variable existed was because of Chris McDonough mentioning it a long long time ago (before the new Zope Corp offices). Not only is it undocumented, it's undocumented incorrectly ;). At the end of doc/ENVIRON.txt, it's listed as FORCE_PRODUCT_RELOAD with the wording "unknown (Shane's Refresh product ???)". If someone with a deeper understanding of what this environment variable does - and of the correct times to use it - I'm sure there are other people it would help. I'd document it myself, but I don't want to spread more misinformation. I've guessed at what it does - I believe it's forcing a write to ZEO of the currently installed disk products running at the client side - but that's the nearest I could figure out. j.shell