I have only noticed this when using the Kendo UI controls in an Angular project.  On touch devices when tapping a show/hide toggle button (like the calendar button on a date picker) it causes the calendar to quickly open and close.  There seems to be an issue in angular causing the click event to fire twice.  I have more notes about the issue and a workaround using a directive to band-aid this for now, but it would be nice if the fix were integrated into a future Kendo UI build.  Please refer to ticket 1033999 for more information.

http://www.telerik.com/account/support-tickets/view-ticket?threadid=1033999