We are having a touchscreen problem with the RadSearchBox, specifically on the MicroSoft surface touchscreen. I have tested this out on mobile phone and other tablets, but the problem occurs on the Surface.
The issue is that you cannot change the SearchContext, because it never seems to recognize the touch event.
You can touch the SearchContext to initiate the drop-down event, but then it is impossible to select an item from the list.
There are no other problems with Telerik controls on the Surface (the touch events on RadDropDown, RadTabStrip, RadComboBox, RadMenu, etc.) all seem to be working fine.