Stupid MSIE Tricks
In case you didn’t know, Microsoft Internet Explorer 6 doesn’t understand a closed <script/> XHTML tag; if you try and do something valid like <script language="JavaScript" src="/path/to/my/script.js" />, MSIE will simply display a blank white page. Hooray!
Thankfully, I found a mention of the problem at http://kiza.kcore.de/journal/2005-02, via a Google search for msie css problem “blank page” So, you have to write script tags like <script language="JavaScript" src="/path/to/my/script.js"></script> to make MSIE happy.