ASP.NET Themes Don’t Like IE8’s X-UA-Compatible header; Neither Do I

"I ran into an interesting issue a few months ago with IE8 support on sites which use ASP.NET Themes. I’ll talk about the issue and how to fix it. More important, though, I’ll talk about how this small example fits into the whole IE8 / X-UA-Compatible thing, and why I think the way that turned out was bad for everyone."