JBoss Seam not rendering any tags?

If you ever run into the weird situation where you use JBoss Seam with Facelets and everything seems to be working, except the page does not render any tag - no matter whether it is s, h, f, a4j, rich or ui (the common abbreviations for them), then have a look at faces-config.xml.  I once made the simple mistake of calling the file faces_config.xml, effectively the same as not having that file.  However since it WAS there and did look almost like faces-config.xml, I missed it for 3 hours.  Do not make the same mistake - ensure that file is there, correctly spelt and in the xxx.war/WEB-INF/faces-config.xml location.