I tried to run existing unit tests in RC2 an mocks are failing saying there's an unexpected call to isInstance everywhere. Where is this coming from, its not in the tests? I imagine this is a groovy problem but I'm not sure. Partial trace.... <failure message="No more calls to 'isInstance' expected at this point. End of demands." type="junit.framework.AssertionFailedError">junit.framework.AssertionFailedError: No more calls to 'isInstance' expected at this point. End of demands. at java.lang.reflect.Constructor.newInstance(Constructor.java:494) at org.codehaus.groovy.runtime.MetaClassHelper.doConstructorInvoke(MetaClassHelper.java:465) at groovy.lang.MetaClassImpl.doConstructorInvoke(MetaClassImpl.java:2086) at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1022) at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:952) at groovy.lang.ExpandoMetaClass.invokeConstructor(ExpandoMetaClass.java:521) at org.codehaus.groovy.runtime.Invoker.invokeConstructorOf(Invoker.java:126) at org.codehaus.groovy.runtime.InvokerHelper.invokeConstructorOf(InvokerHelper.java:103) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeNewN(ScriptBytecodeAdapter.java:233) at groovy.mock.interceptor.LooseExpectation.isEligible(LooseExpectation.groovy:56) at org.codehaus.groovy.reflection.CachedMethod.invokeByReflection(CachedMethod.java:107) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:127) at org.codehaus.groovy.runtime.metaclass.StdMetaMethod.invoke(StdMetaMethod.java:18) at org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:538) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:749) at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:945) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurrentN(ScriptBytecodeAdapter.java:66) at groovy.mock.interceptor.LooseExpectation.match(LooseExpectation.groovy:45) at org.codehaus.groovy.reflection.CachedMethod.invokeByReflection(CachedMethod.java:107) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:127) at org.codehaus.groovy.runtime.metaclass.StdMetaMethod.invoke(StdMetaMethod.java:18) at org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:538) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:749) at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:945) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:589) at org.codehaus.groovy.runtime.Invoker.invokePogoMethod(Invoker.java:98) at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:79) at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:74) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:158) at groovy.mock.interceptor.MockInterceptor.beforeInvoke(MockInterceptor.groovy:30) at groovy.mock.interceptor.MockProxyMetaClass.invokeStaticMethod(MockProxyMetaClass.java:59) at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:69) at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:74) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:158) at org.codehaus.groovy.grails.plugins.web.ControllersGrailsPlugin$_closure4_closure85.doCall(ControllersGrailsPlugin.groovy:511)