I don't know about the icon blurriness thing but for IPS displays some light bleed is common on a dark background. I have two 640's both with a little of it but its not a huge amount. If you could take a picture it would be helpful to determine how bad it is and if it warrants an exchange or return.
Only think wrong with mine are the whites are a bit on the warmer side which im not used to, but nothing changing the color profile couldnt fix.