I'm running just a simple test which was working fine on JBossAS 7.1.1. Now on 7.1.2 (see description in the Environment section) I'm getting this stacktrace:

java.lang.RuntimeException: Could not create a new instance of class org.jboss.arquillian.test.impl.EventTestRunnerAdaptor see cause.
at org.jboss.arquillian.test.spi.SecurityActions.newInstance(SecurityActions.java:170)
at org.jboss.arquillian.test.spi.TestRunnerAdaptorBuilder.build(TestRunnerAdaptorBuilder.java:52)
at org.jboss.arquillian.junit.Arquillian.run(Arquillian.java:93)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:236)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:134)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:113)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:103)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:74)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.jboss.arquillian.test.spi.SecurityActions.newInstance(SecurityActions.java:166)
... 14 more
Caused by: java.lang.RuntimeException: Could not create a new instance of class org.jboss.arquillian.core.impl.ManagerImpl see cause.
at org.jboss.arquillian.core.spi.SecurityActions.newInstance(SecurityActions.java:157)
at org.jboss.arquillian.core.spi.ManagerBuilder.create(ManagerBuilder.java:77)
at org.jboss.arquillian.test.impl.EventTestRunnerAdaptor.<init>(EventTestRunnerAdaptor.java:55)
... 19 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.jboss.arquillian.core.spi.SecurityActions.newInstance(SecurityActions.java:153)
... 21 more
Caused by: java.lang.NoSuchMethodError: org.jboss.logmanager.LogContext.getLoggerIfExists(Ljava/lang/String;)Lorg/jboss/logmanager/Logger;
at org.apache.log4j.JBossLogManagerFacade.updateParents(JBossLogManagerFacade.java:197)
at org.apache.log4j.JBossLogManagerFacade.getLogger(JBossLogManagerFacade.java:145)
at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:130)
at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:125)
at org.apache.log4j.LogManager.getLogger(LogManager.java:57)
at org.apache.log4j.Logger.getLogger(Logger.java:35)
at org.jboss.logging.Log4jLogger.<init>(Log4jLogger.java:35)
at org.jboss.logging.Log4jLoggerProvider.getLogger(Log4jLoggerProvider.java:33)
at org.jboss.logging.LoggerProviders.find(LoggerProviders.java:37)
at org.jboss.logging.LoggerProviders.<clinit>(LoggerProviders.java:32)
at org.jboss.logging.Logger.getLogger(Logger.java:2163)
at org.jboss.logging.Logger.getLogger(Logger.java:2188)
at org.jboss.as.arquillian.protocol.jmx.ArquillianServiceDeployer.<clinit>(ArquillianServiceDeployer.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.jboss.arquillian.core.impl.Reflections.createInstance(Reflections.java:128)
at org.jboss.arquillian.core.impl.ManagerImpl.createExtensions(ManagerImpl.java:410)
at org.jboss.arquillian.core.impl.ManagerImpl.fireProcessing(ManagerImpl.java:345)
at org.jboss.arquillian.core.impl.ManagerImpl.<init>(ManagerImpl.java:98)
... 26 more