Beware of Internet Explorer's File: Save As dialog!
IE's default 'Save As' action is to
slurp the entire web page (images and dependent files included) into a
new directory which has the same <title> as the web page.
In doing so it rewrites the page using the HTML4-loose DOCTYPE.
This is obviously a bad thing if you're working in XHTML so make sure you choose the Web Page, HTML only option from the 'Save as type' list box, as the image below shows:
NB This is taken from IE6 in Windows XP - it looks similar in IE5 and/or Windows NT.
