err... just the model number would have done
Ok.. no reason whatsoever why that should be blurred.
When you say it's not sharp... what are you comparing it with? Not sharp compared to what? Is it always blurred, or just when viewing certain things in certain programs?
If it's blurred compared to another LCD monitor you own, then there's something wrong with it. Return it under Eizo's return swap out warranty. It's a ColorEdge screen so you have 5 years... they'll drop off a new one, and take your old one away. If there turns out there's nothing wrong with it though, you'll get charged shipping.
Word of warning though... if you are comparing a coated monitor to a glossy monitor very critically, you will see that the glossy screen appears sharper.. but at normal viewing distances, there should be no difference.
Make sure you have tested it with a direct DVI to DVI connection before you write it off.
BTW... unless you are working in a dark room, I'd calibrate to 120Cd/m2 not 90.