...or if the client still insists on viewing it in IE, even when you explain all about it and the pro's and cons to them.
Quite a lot of poeple I've worked for still insist on using it. They normally ask "what? there's other browsers, like what. Hmm, sounds a bit dodgy to me I'll stick with IE I think" either that or they tell you they're using safari - or whatever - and they've actually gone back to their old IE ways.