The currently used version of Shindig in GateIn was pointing to an unoffical repo that was not made for official releases of Guice. http://guice-maven.googlecode.com/svn/trunk/com/google/code/guice/guice/2.0/ The issue is that some time before Guice 2.0 was uploaded on JBoss Repo as it was available nowhere, and those 2 have the same groupId, artifactId and version but they are different (one include guice-jmx libraries the other doesn't) ! The libraries on the JBoss repo are the correct ones (the one that correspond to the downloadable zip). So we updated yesterday our copy of Shindig to use the library on JBoss + guice-jmx. It's possible that you have a local copy of the wrong com.google.code.guice:guice:2.0 so if you have issues with Shindig/Guice just delete your local copy. I hope that it will be fine... Thomas