The following bug has been logged online:

Bug reference: 2547
Logged by: John Bester
Email address: john.bester (AT) snowball (DOT) co.za
PostgreSQL version: 8.1
Operating system: SUSE 10.0
Description: Notifications lost when using JDBC
Details:

I found that if I create a JDBC connection to Postgres and listen for
notifications, it works until I create a new connection. I have not checked
whether notifications are received on the new connection, but even if it did
I would still consider it to be a bug. You should be able to create a
notification listener that works with it's own connection in a seperate
thread without having to know when new connections are made.

---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to majordomo (AT) postgresql (DOT) org so that your
message can get through to the mailing list cleanly