jquery mobile fixed footer not at the bottom, on windows Phone 7 and 8

jquery mobile fixed footer not at the bottom, on windows Phone 7 and 8

I am converting my app to also run on Windows Phone 7.x and 8 (it is already running on iPhone and Android).

I have this issue where the footer does not show at the very bottom but sits a little above the end. As you can see on the Picture her: https://dl.dropbox.com/u/7685276/Footer%20issue.png

Can any of you help.. As I say this is not a issue on Android and iPhone.

It is jQuery 1.9.1, jQueryMobile 1.3, PhoneGap 2.4.

Thanks i advance

Kim