I know I could Google, but very quickly, how do you get into safe mode?
I guess, once you are in safe mode, you could delete Activator, or maybe SBSetiings entirely?
Thanks!
PS: I want to add that iBooks and Google Books crash in the JBed iOS 5.0 GM. Prior to JB, only Google Books crashed, iBooks worked.
Are you trying to remove SBSettings? Removing Activator will do so, I believe.
Entering safe mode through SBSettings:
Activate SBSettings
Click Power
Click Safe Mode