I have four CentOS 5.2 servers running Samba with Active Directory authentication, several Macintosh OSX workstations/laptops (10.4 & 10.5) that are joined to the domain. The plan is to shortly ...

If your Event Viewer log says DCOM got error "87" attempting to start the service GamingServices, follow the solutions ...

Thanks, that was the problem. I forgot that about a week ago I had edited my Group Policies and disabled Windows Messenger. I change it from disabled to "not load on startup" and it works fine now.