We have had a problem with postgresql 8.3 on a Windows server 2008. I wonder whether there has been any other experiences like this. We have connected to Potsgres from Zope via a Psycopg adapter and noticed that sometimes when data is inserted via a form in Zope, the data is available in Zope but doesn't get committed to the database. This has come to a head over the weekend where at least one month's worth of data has disappeared and this includes changes to the actual database structure - luckily only on a testing machine, but concerning nevertheless. The data seemed to disappear after we upgraded to the most recent version of Zpsycopg2 database adapter, previously we were using version 1 (I know it's old, we are only testing after all) and have never had these sorts of problem before. It's almost as if all the data and changes to the db were held in memory, and Postgres continued to work fine from there, but when the db adapter was changed and Zope restarted everything was cleared from memory. Has anyone had similar experiences or can anyone cast any light on where the problem may lie. To us it seems the db adapter is the most likely candidate but we can't understand how this could happen, explanations also welcome. Have posted this to psycopg list too. Thanks