When I open up my contacts app on my jailbroken iphone 4 it takes a good 5 seconds before I see anything but a white screen (this is with contacts not in the multitask bar or whatever that thing is called when you double-tap the home button). I noticed a similar delay when I open up GroceryIQ (also get a white screen). I'm not sure what is causing this lag but it's annoying to say the least. Can a few of you please try opening up contacts on your jailbroken iphone 4's and let me know if you have this same problem? Make sure that you open the actual contacts app and not the phone app. Also, make sure that Contacts isn't currently listed in the multitask bar. If you have this same problem, please list the jb apps you have installed so we can see if we have anything in common that could be causing the lag.