Well, subject. I've just designed a child theme of TwentyTwelve, and while testing on Android phone, noticed that absolutely all links are impossible to click. The problem is that their clickable area is hidden above the actual text.
After lotsa' trial-and-error debugging, I found out what the problem was:
you would need to change it to
otherwise the site will be not usable on Android.
If anyone had the same problem on other mobile platforms, can you drop a line here?