If the example don't run under http://tecfa.unige.ch/ try http://tecfa2.unige.ch/ !!! (add "2" to tecfa in the URL in your browser)
If you MUST use a Krosoft browsers (any version of IE) I believe, be aware that they do not respect the HTTP protocol. I.e. contents of *.text files will not show in your browser (do a view source something). This because those stupid microsofties don't listen to the server that tells text/plain. They look at the contents ... and it's HTML indeed. If anybody knows whether IE can be configured to behave correctly let me know.