Hi (again) Thomas,
> Perhaps you could try the latest
> snapshot?
I've downloaded this, and replaced the various files in <PGDir>\lib and
<PgDir>\Share\pljava with the new versions (not following your no-doubt
excellent instructions). And it seems to work, not just once but
repeatedly, including after re-booting and changing the log_min_messages to
info.
No doubt I'll run into further difficulties and will be bothering you again,
but thanks very much for your help over the last few hours.
Mark