Now we tested the latest version, jboss-3.0.1
+ Jdk1.4/Jdk1.3 + postgres 7.2+ winNT/Linux RedHat 7.2, and exactly the same problem occurrs.
We don't know what to do?, we have been having that problem for 5 months.
Is JBoss really prepared for production of big enterprise applications?.
I suggest you post this in the JCA forum as this looks like an error in the JDBC JCA wrapper.