Hi,
did you download the sample application from the axon project site? There is a new version now that doesn’t have this problem. For some reason, maven prefers the 1.5.8 version (via Hibernate) over the 1.6.1 version via Axon. This causes maven to include the 1.5 api with the 1.6 implementation in the war file.
Cheers,
Allard