Just read this in an RFP, what do you think it means?

\"The site should be 99% accurate in IE7, Firefox 2 and 3, Safari for Mac and PC, and Chrome\"

How do you go about measuring 99% accuracy of a web page.  Does this mean pixel perfect rendering to your designer\'s PDF file, non-websafe fonts and all? My engineering brain can\'t figure out how to discern 99% accuracy across 4 different browsers/rendering engines.  At least they were smart enough to leave out IE6.