My favorite App is the Olive Tree + (free) Bible program. Up until just recently there had been no issues with it, at all. But now this App will not function for me. When called upon, it's opening screen will show (for just a second, or so), but then will close down, with me looking back the desktop. This happens, now, each and every time that I attempt to access it.
It could be just coincidence, but the problem seemed to surface right on the heels of my recent jailbreak. The only thing I can think to do would be to remove the program altogether, and see what happens after a reinstallation. Hopefully, that will work.