Do StartSSL issued free 1-domain certificates valid for all major desktop and mobile browsers? Can anyone confirm this? Most cert providers claim almost always 99% and above comptability but they dont claim any percent value on their website.
99 percent of what? Browsers ever made? Visitors to your site?
I read that Microsoft added the StartCom CA to Windows in 2009. So I would assume that people browsing the web with ancient, unpatched versions of IE will have problems. How big a deal that is probably depends on your site.
