I am working on something which I hope will achieve greater similarity with the look of other badges. Other priorities are high legibility across devices and consistency of the appearance across browsers. See here for some of the effort on tweaking the appearance, and here for more.
It seems there is a kind of "de facto standard" for badges' appearance.
Right now, img.shields.io is not following it, so its badges stand out as "different".
Example : https://github.com/Offirmo/network-constants.js
You can see that badges from img.shields.io have a bigger font, a slightly different color and more round corners.
I thank img.shields.io would be even more awesome if it was following the other badges styles, which I find better. Badges should be small.
What do you think ?