With the increasing interest in WCF comes the need to understand how to troubleshoot it.

From the MSMQ perspective, there is a "Troubleshooting Queued Messaging" FAQ document available that covers what is (or is not) possible between machines running different versions of MSMQ, integration problems, security issues and so on.

Not all the information is WCF-specific and the document is worth a read even if you haven't implemented WCF at all for the golden nuggets of information it contains.

I'll see if I can get this content added to the main MSMQ FAQ