Windows Phone 8 GDR2 appears to fix low-resolution profile images for Me tile
One of the bugs that some of us noticed on Windows Phone, possibly starting after the GDR1 OS update , was a fuzzy and low resolution image of ourselves for the Me tile. It was particularly frustrating on devices with high resolution displays, as everything would look sharp and crisp except for your blurry mini me. Despite re-uploading the photo numerous times, the service, tied to your Live/Outlook account, would downgrade the image and push back a fuzzy version within a few hours.