How about us, putting together a page that outlines, reasons why the webgl application hasnt worked on their machine & possible ways to fix it.
Ive seen other ppls messages & often its just a alert box saying no webgl support, which isnt very user friendly esp to someone with little PC knowledge, where its "webgl, whats webgl?"

Heres what I have ... grade.html

but it can be improved heaps Im sure, as Im not the best at explaining things so theyre easy to understand

cheers zed