StubFor: No more calls to 'openConnection' expected at this point. End of demands

I am having troubles with Stub for in Groovy 1.6 Betas. I am attaching a short self contained Test that illustrates the problem. The same script runs fine in 1.5.6

No more calls to 'openConnection' expected at this point. End of demands.

at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:70)
at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:64)
at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrap.callConstructor(ConstructorSite.java:69)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:200)
at groovy.mock.interceptor.LooseExpectation.isEligible(LooseExpectation.groovy:56)
at groovy.mock.interceptor.LooseExpectation$isEligible.callCurrent(Unknown Source)
at groovy.mock.interceptor.LooseExpectation.match(LooseExpectation.groovy:45)
at groovy.mock.interceptor.LooseExpectation$match.call(Unknown Source)
at groovy.mock.interceptor.MockInterceptor.beforeInvoke(MockInterceptor.groovy:30)
at groovy.mock.interceptor.MockProxyMetaClass.invokeMethod(MockProxyMetaClass.java:52)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:34)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
at Get2.getText(StubTests2.groovy:39)