I have a problem with facelets library ignoring taglibs definition from jar files placed in WEB-INF/lib directory. Following code in method TagLibraryConfig.loadImplicit returns empty urls array.
ClassLoader cl = Thread.currentThread().getContextClassLoader();
URL urls = Classpath.search(cl, "META-INF/", ".taglib.xml");
ok, it's a issue with jboss VFS fixed in facelets v 1.1.15.B1.