Here's your call stack ( ICS @ Nexus S ).
12-07 14:31:41.207: E/AndroidRuntime(3718): FATAL EXCEPTION: main
12-07 14:31:41.207: E/AndroidRuntime(3718): java.lang.RuntimeException: Unable to resume activity {com.avast.android.mobilesecurity/com.avast.android.mobilesecurity.app.wizard.ScanWizardActivity}: java.lang.NullPointerException
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2443)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2471)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.access$600(ActivityThread.java:122)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.os.Handler.dispatchMessage(Handler.java:99)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.os.Looper.loop(Looper.java:137)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-07 14:31:41.207: E/AndroidRuntime(3718): at java.lang.reflect.Method.invokeNative(Native Method)
12-07 14:31:41.207: E/AndroidRuntime(3718): at java.lang.reflect.Method.invoke(Method.java:511)
12-07 14:31:41.207: E/AndroidRuntime(3718): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-07 14:31:41.207: E/AndroidRuntime(3718): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-07 14:31:41.207: E/AndroidRuntime(3718): at dalvik.system.NativeStart.main(Native Method)
12-07 14:31:41.207: E/AndroidRuntime(3718): Caused by: java.lang.NullPointerException
12-07 14:31:41.207: E/AndroidRuntime(3718): at com.avast.android.generic.util.ga.b.a(EasyTracker.java:335)
12-07 14:31:41.207: E/AndroidRuntime(3718): at com.avast.android.generic.util.ga.TrackedFragment.a_(TrackedFragment.java:29)
12-07 14:31:41.207: E/AndroidRuntime(3718): at com.avast.android.mobilesecurity.scan.ScanFragment.a_(ScanFragment.java:179)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.support.v4.app.o.a(FragmentManager.java:884)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.support.v4.app.o.a(FragmentManager.java:1041)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.support.v4.app.o.a(FragmentManager.java:1024)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.support.v4.app.o.m(FragmentManager.java:1744)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.support.v4.app.FragmentActivity.onPostResume(FragmentActivity.java:406)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.Activity.performResume(Activity.java:4552)
12-07 14:31:41.207: E/AndroidRuntime(3718): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2433)
12-07 14:31:41.207: E/AndroidRuntime(3718): ... 12 more
