Is it my eyes, or my screen, or does Renderosity blurs images a lot when it shrinks it to fit the page, at the galleries?

In Cornucopia3D, for example, that doesn't happen. The shrinked image is as sharp as the original, full size version. There's even a site, RedBubble, where the shrinked image is even sharper than the original one.

Am I making myself clear?...