It seems this issue does not affect all users. I'm not sure which systems are affected and which not. It would be interesting to find out. My family has three PCs, two desktops and a laptop, all of them running Windows 8 with the latest updates. And all
of the three PCs have the same font rendering problem on IE10. Maybe it's because they are connected with analog cables (VGA) to their monitors, maybe it's because they don't have state-of-the-art graphics cards which do not support DirectX 11. Whatever the
reason may be, a lot of people are reporting the same problem so it's a real one!
The bigger the letters, the problem seems to vanish. So high DPI settings will make it less noticeable. My DPI setting is on default (smaller-100%).
The problem appears on specific "areas". Internet Explorer menus and the address bar appear perfectly sharp while some webpages awfully blur. The difference between Google Chrome and IE is also very big: sharp and smooth fonts on the first browser, blurry
and fuzzy on the last (for the same webpages).
The cause of the mess is also known, it has to do with the new rendering technology that replaces the old classic Clear type which is pushed away because it's not compatible with tablets. Seehere for more details about the rendering methods. In any case, users with older hardware should be able to enjoy a smooth experience with their new OS without such kind of problems. Since Microsoft is selling its operating system as compatible with our
PCs they must find soon a solution to the problem.