i have a bitmap set as environment map for reflection in screen mode.
If i use this mode, the blurred reflection is not blurred.
If i set the environment map as spherical, cylindrical or shrink wrap the blurred reflection is right.
its not a bug. Screen mapping projects pixels through everything and is not considered to by rays at all.
If you are looking for a way to blur the background on the object you must ether use a card, or camera map…