The small version of the logo (for example in the upper left corner of their home page) appears significantly misaligned. The red box will appear to be 2/3 of a pixel to the left of the blue box on most LCD panels due to the structure of the RGB elements in each pixel. The strong vertical lines and narrow gaps in the logo, along with the vertically aligned primary colors, makes this a really glaring problem. How embarassing for Microsoft, inventors of ClearType some 15 years ago, who should have known all about this issue.
It took me about 10 seconds to notice this and another 10 seconds to figure out why. Microsoft spent how long and how much money coming up with this logo?