Slow to Visual Studio Designer Window and Web Projects

I had been noticing that it took longer than expected to display the designer in Visual Studio for a web page or a WinForms form.

One of the guys here found an option in IE (Tools -> Options -> Advanced tab -> Under the security group -> Uncheck "Check for publisher's certificate revocation").

This made a huge difference in going from code view to designer view.

No idea why an IE setting would affect WinForms projects or designers in general.