You know, you might be looking at a screenshot that has font settings (hinting etc) which work on the originating display and fail on yours. No reason to jump to snarkiness.
Yes, but font hinting takes advantage of the specific subpixel layout of your LCD (e.g is the order RGB left-to-right, top-to-bottom, two greens and forming a square, etc). If you take a screenshot and look at it on another monitor, it's quite possible for it to look awful because your RGB subpixel layout and the source differ.
