Got tough IE questions? Check EricLaw's blog

Eric Lawrence is a program manager on the Internet Explorer team & best known as the creator of Fiddler. He has also developed several IE addons & browser-related tools.

I have found his blog posts to be insightful. His answers to difficult questions asked on forums are informative & comprehensive. Here's a compilation of his posts that I liked most -

• The Performance Impact of META REFRESH
• Forcing Internet Explorer To Forget To Not Remember
• Understanding Session Lifetime
• Understanding Cookie Controls
• Friendly HTTP Error Pages

(work in progress...)

Also see:
Fiddling with Fiddler