A problem Appeared in a jailbroken iOS 5 install that when you run an application it will display in the quarter of the screen only and the rest of the screen goes to black screen. We will introduce the solution of this problem in this topic .
According to idownloadblog :
The issue rears its head after installing Activator from Cydia, which comes with the majority of jailbreak tweaks and apps. Currently, there’s an issue with Activator that causes the problem with iOS 5.Steps to solve this error :
Step 1: Open SBSettingsHere is the video :
Step 2: Tap “Power”, and select “Safe Mode”
Step 3: Once booted into safe mode, tap the status bar when it says “Safe Mode”. This will bring up a prompt; tap “Restart” to restart into normal mode
Step 4: Launch an offending app, and the issue should be resolved.