Java Webstart does not check the JNLP-file for well-formedness

I have spent some time playing with the extension mechanism available in Java WebStart 1.5+ and found that Java WebStart does NOT check the JNLP-files for well-formedness so a lot of time can be spent in not noticing if you have forgotten the closing /'s in the

<jar href="foo/bar.jar">
<jar href="foo/bar.jar">
<jar href="foo/bar.jar">

section.

Well, now I know a LOT more about JNLP-file processing than I did earlier today :)