One of the common issues when you use jQuery Mobile with Apache Cordova in Windows Phone 8 is the following:

• Trimmed header title.
• Footer is not aligned to bottom.

As shown in the following screenshot:

The following post shows you how to fix these issues:
http://cordovabookland.com/2014/11/tip-1-cordova-integration-with-jquery-mobile-in-windows-phone-8/