postgres 3.7 unexpected closing of connections

I have the following error message:

"Error connecting to the server: server closed the connection unexpectedly.
This probably means that the server terminated abnormally before or
while processing the request.
"
It happens intermittently both when using pgAdminIII and when using QT
so it is not a pgAdminIII issue.

Often the connection seems to succeed but you get a series of error
messages like the one above when attempting to open a database. It
seems to be a timing issue.

This does not happen with postgresql-8.3.5 but does happen with
postgresql-8.3.7. I used the One-click installer from EnterpriseDB and
am running Vista SP1.

Has anyone any ideas on how to fix this? it is really annoying because
it is intermittent.
I have done a complete reinstallation and deleted everything before
reinstalling it. Lucky it is only a test installation!

Andrew

--
___________________________________________
Andrew J. P. Maclean
Centre for Autonomous Systems
The Rose Street Building J04
The University of Sydney 2006 NSW
AUSTRALIA
Ph: +61 2 9351 3283
Fax: +61 2 9351 7474
URL: http://www.acfr.usyd.edu.au/
___________________________________________