I've created three sites recently, making child themes for Twenty Twelve.
In all three cases, when viewed on mobile (or a small viewport), the menu is not collapsing into the menu button. The button is appearing but the menu is remaining where it previously was.
In all three cases, I used One-Click Child Theme to create the child theme. Two of them have no other plugins installed.
Here is an example of one of the sites that is failing... http://leafrankdesign.com.s81743.gridserver.com/lea/
Can someone help me fix the menu so it collapses properly?
Also, I did create/name a menu and assign it as the primary menu, so that isn't the problem.
Any help would be appreciated! I've google the problem and I can't find any other people with this issue.