I'd like to point out (again?) that catalog files coming with
http://www.tei-c.org/Guidelines2/p4html.tar.gz are still broken.  At
least, teicatalog.xml and catalog.tei are affected.  Entries are listed
again and again and teicatalog.xml isn't a well formed XML file
(elements are not properly nested).

In http://www.tei-c.org/P4X/ST.html you start the example file as
follows:

<!DOCTYPE TEI.2 PUBLIC "-//TEI P4//DTD Main Document Type//EN"
   "tei2.dtd" [

But in the catalog file you say: "DTD Main DTD Driver File":

<public publicId="-//TEI P4//DTD Main DTD Driver File//EN"
uri="http://www.tei-c.org/Guidelines/DTD/tei2.dtd"/>

It might be a good idea to add "DTD Main Document Type" as well to the
catalog.