The footer currently has cc by-sa written in small case but it should be capitalized as CC BY-SA following the style used in the official Creative Commons page, the Help Center, and one of the announcement posts.
Also, if anyone's wondering:
- CC stands for Creative Commons.
- BY stand for by, as in: "All of our licenses require that users provide attribution (BY) to the creator".
- SA stands for "ShareAlike (SA), which requires adaptations of the material be released under the same license".