For me, I take screen shots of all About screens after each update, then compare those to what they look like after the next update. In my case, with a (today) 7MB update from AT&T, there was nothing changed on those at all...but two apps that I always remove (NewsStand and FourSquare) were pushed back to me. So something changed, just nothing apparently at the core.
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.