Most likely the XSL transform is failing, which can happen if you modify the server/xxx/deploy/jboss-web.deploy.service.xml file.
The transform can be found in sample-bindings.xml, lines 364-387 (or look for the "*** tomcat ***" section).
Ok, now it's working. I copied the original server.xml in the directory jboss-web.deployer - and that's was.
But I can't see any differences between my old file and the original file. The only change I hade made was setting the port from 8080 to 8480.
Hmm, very strange.
You changed the port number in the server.xml file to 8480? That is enough for the transform to miss the port and for the sample-bindings.xml not to work.