Warning on transaction commit

Hi all,

I'm getting a warning message in my logs that looks like this:

WARNING:  COMMIT: no transaction in progress

when I run this code:

dbh.setAutoCommit(false);
Statement doEvents = dbh.createStatement();
doEvents.executeUpdate("DELETE FROM ...");
doEvents.executeUpdate("INSERT INTO ...");
dbh.commit();
dbh.setAutoCommit(true);

The statements do what they're supposed to do, but I don't understand
why I'm getting that warning message.  Anyone know why?

I'm running PostgreSQL 7.3.1 and using the PostgreSQL 7.3 JDBC 2 driver
that I just downloaded a couple days ago from jdbc.postgresql.org.

Thanks,
--Jeremy