Class not found exception when weld-osgi 1.2 is deployed in Apache Karaf 2.3.0

2012-12-21 13:53:00,851 | ERROR | FelixStartLevel | Weld | nment.osgi.impl.integration.Weld 104 | 98 - org.jboss.weld.osgi.core.integration - 1.2.0.SNAPSHOT | Initialization of Weld instance for bundle org.apache.felix.framework [0] caused an error: java.lang.NoClassDefFoundError: org/slf4j/cal10n/LocLoggerFactory
java.lang.NoClassDefFoundError: org/slf4j/cal10n/LocLoggerFactory
at org.jboss.weld.logging.LoggerFactory.<init>(LoggerFactory.java:38)
at org.jboss.weld.logging.LoggerFactory.loggerFactory(LoggerFactory.java:51)
at org.jboss.weld.bootstrap.WeldBootstrap.<clinit>(WeldBootstrap.java:127)
at org.jboss.weld.environment.osgi.impl.integration.Weld.initialize(Weld.java:81)
at org.jboss.weld.environment.osgi.impl.WeldCDIContainer.initialize(WeldCDIContainer.java:111)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.startManagement(IntegrationActivator.java:219)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.startCDIOSGi(IntegrationActivator.java:115)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.serviceChanged(IntegrationActivator.java:181)
at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932)
at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4260)
at org.apache.felix.framework.Felix.registerService(Felix.java:3275)
at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:320)
at org.jboss.weld.environment.osgi.impl.WeldActivator.start(WeldActivator.java:48)
at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:645)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:1977)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1895)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1191)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.ClassNotFoundException: org.slf4j.cal10n.LocLoggerFactory not found by org.jboss.weld.osgi.core.mandatory [94]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1460)
at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:72)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1843)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 22 more
2012-12-21 13:53:00,854 | ERROR | FelixStartLevel | Weld | nment.osgi.impl.integration.Weld 104 | 98 - org.jboss.weld.osgi.core.integration - 1.2.0.SNAPSHOT | Initialization of Weld instance for bundle org.ops4j.pax.url.mvn [1] caused an error: java.lang.NoClassDefFoundError: Could not initialize class org.jboss.weld.bootstrap.WeldBootstrap
java.lang.NoClassDefFoundError: Could not initialize class org.jboss.weld.bootstrap.WeldBootstrap
at org.jboss.weld.environment.osgi.impl.integration.Weld.initialize(Weld.java:81)
at org.jboss.weld.environment.osgi.impl.WeldCDIContainer.initialize(WeldCDIContainer.java:111)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.startManagement(IntegrationActivator.java:219)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.startCDIOSGi(IntegrationActivator.java:115)
at org.jboss.weld.environment.osgi.impl.integration.IntegrationActivator.serviceChanged(IntegrationActivator.java:181)
at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932)
at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4260)
at org.apache.felix.framework.Felix.registerService(Felix.java:3275)
at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:320)
at org.jboss.weld.environment.osgi.impl.WeldActivator.start(WeldActivator.java:48)
at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:645)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:1977)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1895)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1191)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
at java.lang.Thread.run(Thread.java:680)