Also, if I use that Configuration to build a SessionFactory, it fails with the following exception (3.6.10):

java.lang.ArrayIndexOutOfBoundsException: 1
at org.hibernate.persister.collection.AbstractCollectionPersister.initCollectionPropertyMap(AbstractCollectionPersister.java:1735)
at org.hibernate.persister.collection.AbstractCollectionPersister.initCollectionPropertyMap(AbstractCollectionPersister.java:1711)
at org.hibernate.persister.collection.AbstractCollectionPersister.<init>(AbstractCollectionPersister.java:599)
at org.hibernate.persister.collection.BasicCollectionPersister.<init>(BasicCollectionPersister.java:74)
at org.hibernate.persister.PersisterFactory.createCollectionPersister(PersisterFactory.java:104)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:307)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872)
at hibernate.EntityATest.testSchema(EntityATest.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)