Seems that similar to #437 caused by some bug in the code ignored by previous version of support lib but crashing on new version.
java.lang.IllegalStateException: The application's PagerAdapter changed the adapter's contents without calling PagerAdapter#notifyDataSetChanged!
Expected adapter item count: 210, found: 240 Pager id: com.trovebox.android.app:id/photos
Pager class: class com.trovebox.android.app.ui.widget.PhotoViewHackyViewPager
Problematic adapter: class com.trovebox.android.app.PhotoDetailsActivity$PhotoDetailsUiFragment$PhotoDetailPagerAdapter
at android.support.v4.view.ViewPager.populate(ViewPager.java:959)
at android.support.v4.view.ViewPager.populate(ViewPager.java:911)
at android.support.v4.view.ViewPager.smoothScrollTo(ViewPager.java:797)
at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:563)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:549)
at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:2004)
at android.view.View.dispatchTouchEvent(View.java:7350)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2412)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2147)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2139)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1476)
at android.app.Activity.dispatchTouchEvent(Activity.java:2487)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2087)
at android.view.View.dispatchPointerEvent(View.java:7535)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3415)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3347)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4456)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4434)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4538)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:125)
at android.os.Looper.loop(Looper.java:124)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
at dalvik.system.NativeStart.main(Native Method)
Seems that similar to #437 caused by some bug in the code ignored by previous version of support lib but crashing on new version.