I've had 7.5 for a while without the fb app. Today I edited the xml file in framework.res so that verizon wireless wouldnt show up on my lock screen. After rebooting, every time I tried to go into account syc the phone would reboot. I found another thread that mentioned the fb app having something to do with this, normally I use bloo. So I downloaded the fb app and logged in, and the problem was solved and I could get into accounts sync and get everything working. I then uninstalled the fb app (again since I use bloo), but now I can't add fb in the account sync. After I click add account, only corporate and google pop up. I just downloaded the fb for android app again, and the problem is solved again. Is there some other way to fix this? Or is this a known issue with 7.5 and I should finally just upgrade?