Opening a RadWindow containing a text input and selecting the input brings up the onboarrd keyboard. If you then zoom the input, the textbox becomes uneditable until the keyboard is manually hidden or the page is refreshed. I believe this is a focus issue, but cannot discern the details.
This seems to be a problem with iframes and iPad. It reproduces with the following markup on the main page: <div class="iframeHolder"> <iframe src="content.aspx"></iframe> </div> .iframeHolder { position: absolute; top: 200px; left: 200px; border: 1px solid red; width: 300px; height: 300px; -webkit-overflow-scrolling: touch; overflow: auto; } .iframeHolder iframe { width: 100%; height: 100%; } which is very similar to the RadWindow - an absolutely positioned element, holding an iframe.