I use Firefox and Opera both, and I've never had a page not found error, or any script error for that fact. Not that Auctiva is error free, cause it's not I have had a couple small issues but no site is perfect.
When I used IE, I could run adaware everynight and have any where from 50 to 200 bugs (kids like to surf). Since I stopped using IE, I'm lucky to have 50 bugs a month. I've also not had problems with pages loading. Just my opinon though.
