Now I know it wouldn't occur to most of the people on here but when I tried to take the quiz with IE7 the site hung as soon as I answered the first question. So 80% of your visitors will never know what it's all about.
Good point, but 80% is a slight exaggeration. Especially if you're talking about slightly techie affluent people in the market for this sort of site. They'll be using chrome, safari, opera, or most likely firefox.
We recently released a new version of the quiz, and looks like we had an IE7 bug which we'll fix right away. BTW - 55% of Sproost visitors have been FF, only 25% have been IE7/6.
using FF 3.0.5 here. I get stuck on the 2nd step of the quiz. The spinner spins forever. However the funny thing is it appears to work fine in IE 8.0.6