On the latest iPad mobiscroll uses wrong theme for date picker. It uses "IOS" theme not "IOS7".
It seems I found a bug in the auto-theme plugin code (mobiscroll.ua-theme-2.9.3.js):

Line 19:
os = osVersion >= 7 ? 'ios7' : 'ios';

Should be rewritten as:
os = osVersion >= "7" ? 'ios7' : 'ios';