Im having the same problem...
jboss 3.0.6, java 1.4.1, windows 2000p
I was using Posgresql7.3, jboss3.0.4 and created new bean with no errors.
The bad thing was that I cound not create CMP beans with CRM fiels that are restricted to be not null in the sql script. So, I was using ejbPostCreate for this purposes as the specification says and received SQLExecption, cause JBOSS inserted a new record right after the ejbCreate method when no relations were established...
Can you help me? Does it work with JBoss3.2RC4?