The new image-based flair is using ClearType for the text. ClearType should never be used in images for general usage. It assumes that you are using a monitor with each pixel composed of red, green, and blue subpixels, in that specific order, arranged horizontally. This is not true for all users. On some monitors, the pixels are arranged blue-green-red (this is why Microsoft has the option in the ClearType Tuner). On mobile devices, the orientation of the subpixels depends on the orientation of the device. I'm not sure how CRTs handle this (I haven't used one in about five years).
If these assumptions are not met, the image looks bad (especially in the case of monitors with blue-green-red subpixels).
when images are prepared to be display-independent (that is, when they are prepared for distribution, and not just for display on the computer with which they were prepared), ClearType should be turned off if rendered text is part of the image. For example, screenshots should always be prepared with ClearType turned off. Image-editing programs such as Adobe Photoshop or Corel Paint Shop Pro bypass ClearType when rendering text directly, for precisely this reason.