Hi there,
I think there is a bug when using mobile: 'phone'. The date in the header bar is there twice. It reads:
<li class="k-state-default k-nav-current"><span data-bind="text: formattedShortDate">6/10/2013 - 6/14/2013</span><span data-bind="text: formattedDate">Monday, June 10, 2013 - Friday, June 14, 2013</span></li>
You can see it here: http://dojo.telerik.com/OZExI
2014Q3 does not show this issue, only the new 2015Q1 release.
br, Chris