I am using IE10 on Windows 8 Pro. On your demo site (http://jquerymobile.com/demos/1.3.0/docs/widgets/table-column-toggle/) when you click on the "Columns..." link and try to unselect any of the columns the browser locks up and you cannot select any other browser tabs (assuming you have any open) until you close the demo site tab. If you only have one tab open you will not be able to select the browser at all. ALT+Tab will not work to get you there. If you are using IE10 and Windows 8 RT and try the above mentioned steps the browser tab will also not be able to be selected but in a slightly different way. When you try to click on the tab you are immediately brought to one of your other open tabs on your browser. Seems to work fine on IE10 and Windows 7.