I too didn't have any luck reproducing the problem. I tried 1.2.x and
1.3.0. Using build-time an the agent enhancer, an update was only
issued if a value was changed. However, runtime enhancement produced
a version update.
You may want to try disabling runtime/fallback enhancement by adding
the property below to your persistence.xml. That's a simple way to
check if your build-time enhancement worked correctly. If not, you'll
get an exception indicating that an entity has not been enhanced.
<property name="openjpa.RuntimeUnenhancedClasses"
value="unsupported"/>
-Jeremy
