Response title
This is preview!
Looks like the IE7 in Windows Phone 7 does not like focusable elements on the first page with JQuery Mobile.
I raised a bug issue # 1491 in Github and Siromega had similar issue in the bug issue # 1504.
I tried Siromega's fix which is
Comment out the line that starts with $( window.document.activeElement || "" ).add[...] in the jquery.mobile.js source code
This worked well for me.
I am not sure about the side effects.
The Github issues links are given below.
© 2013 jQuery Foundation
Sponsored by and others.