The weird thing is that now I'm back on my large LCD, the graphics look blurred again. It appears that it is the profile page that is doing the scaling, because Ctrl+ or Ctrl- can't fix it.
If I load the direct image (http://img.slowgeek.com/?size=1&n=0&lw=1&unit=km&id=1416669565&mtime=1265678975 ) it looks right.
On my profile page (http://slowgeek.com/pr/ATJ777) there's no way I can make the image the same size as the direct image. No matter what I do with Ctrl+ or Ctrl-, image info still has this listed as the dimensions: 650px × 250px (scaled to 660px × 260px) even though the direct image says it is 660px x 260px. But if I overlay the direct image over the one on the profile page, it is always either higher and wider or shorter and narrower, even if I only zoom by one step.
I tried Ctrl 0 which is meant to reset zoom and it is still blurred - the image is larger than it is supposed to be.