I notice Microsoft regularly breaks its own developer URLs as well... even the links from within Visual Studio's help system to their online content. It's sad that the most reliable way to find documentation is through Google.
When I have used online help in visual studio, the worst problems I experienced were some formatting issues.
Amusing that other people have the opposite problem.
I've never experienced what you describe.
That’s why we have things like http://backpan.perl.org/