I spent a couple of hours yesterday evening trying to figure out why I only got a blank white screen after the app splash screen on the BlackBerry 9930 with a JQM 1.0 and PhoneGap 1.2 app that worked fine on the 9550 simulator.
Apparently this problem has been duplicated and the “recommended” fix is to use JQM Alpha 4 (not an option for me in this case). See this post on Google Groups.
I’ve opened an outstanding Github issue ticket for the problem and hopefully can extract the code for analysis.