VS.NET 2005 – Designer Error Shows HTML Source

Since upgrading to Internet Explorer 8.0, my Designer Error Messages have started to be displayed as the HTML source code, rather than as the web page itself.

For instance:

<html><head><META HTTP-EQUIV=”Content-Type” CONTENT=”text/html; charset=UTF-8″><title>…

While possible, this clearly makes debugging these issues much more difficult.  After some searching I found the magic answer here.

Press F5 to refresh the page, and voila it’s a web version of the error.