I'm at my gf's school working on my web page. I normally use Adobe Dreamweaver but her school uses Microsoft Expression Web.

Expression Web is telling me things like:

"The World Wide Web Consortium now regards the attribute 'align' as outdated. New constructs are recommended."

Here are some examples when it comes up:

<div align="center">
<body background="http://garbageartdumpsterbabies.com/images/background.jpg">
<td width="160" height="133">

How seriously should I take Microsoft Expression Web? Where to I find recent standards?