[About XDA developers] Adam77Root:
I experienced two weird issues today.

1.: When I loaded the premium app in the morning, none of the tabs under 'newest' tab were showing anything. I mean: They showed that there weren't any new posts. I have already experienced this sometimes (randomly) before.

2.: When I opened the same app once today, it didn't show the 'private messages' option in the upper bar and when I clicked anywhere, the app crashed and it crashed the Android Runtime as well.

For the second issue, here are the relevant logcat parts:

W/System.err(12939): java.lang.NullPointerException
W/System.err(12939):	at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:432)
W/System.err(12939):	at com.quoord.tapatalkxdapre.activity.forum.ForumNavigationActivity.initialForumStatus(ForumNavigationActivity.java:628)
W/System.err(12939):	at com.quoord.tapatalkxdapre.activity.forum.ForumNavigationActivity.onCreate(ForumNavigationActivity.java:300)
W/System.err(12939):	at android.app.Activity.performCreate(Activity.java:4470)
W/System.err(12939):	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
W/System.err(12939):	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
W/System.err(12939):	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
W/System.err(12939):	at android.app.ActivityThread.access$600(ActivityThread.java:127)
W/System.err(12939):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
W/System.err(12939):	at android.os.Handler.dispatchMessage(Handler.java:99)
W/System.err(12939):	at android.os.Looper.loop(Looper.java:137)
W/System.err(12939):	at android.app.ActivityThread.main(ActivityThread.java:4517)
W/System.err(12939):	at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err(12939):	at java.lang.reflect.Method.invoke(Method.java:511)
W/System.err(12939):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:985)
W/System.err(12939):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:752)
W/System.err(12939):	at dalvik.system.NativeStart.main(Native Method)
W/System.err(12939): java.lang.IllegalArgumentException: no dialog with id 99 was ever shown via Activity#showDialog
W/System.err(12939):	at android.app.Activity.missingDialog(Activity.java:2954)
W/System.err(12939):	at android.app.Activity.dismissDialog(Activity.java:2944)
W/System.err(12939):	at com.quoord.tapatalkxdapre.activity.forum.ForumNavigationActivity.closeProgress(ForumNavigationActivity.java:1010)
W/System.err(12939):	at com.quoord.tapatalkxdapre.activity.forum.ForumNavigationActivity.createTabHost(ForumNavigationActivity.java:643)
W/System.err(12939):	at com.quoord.tapatalkxdapre.activity.forum.ForumNavigationActivity.onCreate(ForumNavigationActivity.java:383)
W/System.err(12939):	at android.app.Activity.performCreate(Activity.java:4470)
W/System.err(12939):	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
W/System.err(12939):	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
W/System.err(12939):	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
W/System.err(12939):	at android.app.ActivityThread.access$600(ActivityThread.java:127)
W/System.err(12939):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
W/System.err(12939):	at android.os.Handler.dispatchMessage(Handler.java:99)
W/System.err(12939):	at android.os.Looper.loop(Looper.java:137)
W/System.err(12939):	at android.app.ActivityThread.main(ActivityThread.java:4517)
W/System.err(12939):	at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err(12939):	at java.lang.reflect.Method.invoke(Method.java:511)
W/System.err(12939):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:985)
W/System.err(12939):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:752)
W/System.err(12939):	at dalvik.system.NativeStart.main(Native Method)

And:

W/System.err(12939): java.lang.NullPointerException
W/System.err(12939):	at com.quoord.tapatalkxdapre.adapter.forum.ForumRootAdapter.authorize_user(ForumRootAdapter.java:117)
W/System.err(12939):	at com.quoord.tapatalkxdapre.util.TapatalkEngine$6.doInBackground(TapatalkEngine.java:502)
W/System.err(12939):	at com.quoord.tapatalkxdapre.util.TapatalkEngine$6.doInBackground(TapatalkEngine.java:1)
W/System.err(12939):	at android.os.AsyncTask$2.call(AsyncTask.java:264)
W/System.err(12939):	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
W/System.err(12939):	at java.util.concurrent.FutureTask.run(FutureTask.java:137)
W/System.err(12939):	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
W/System.err(12939):	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
W/System.err(12939):	at java.lang.Thread.run(Thread.java:856)
D/AndroidRuntime(12939): Shutting down VM
W/dalvikvm(12939): threadid=1: thread exiting with uncaught exception (group=0x40c461f8)
E/AndroidRuntime(12939): FATAL EXCEPTION: main
E/AndroidRuntime(12939): java.lang.NullPointerException
E/AndroidRuntime(12939):	at com.quoord.tapatalkxdapre.adapter.forum.LatestTopicAdapter.getTopic(LatestTopicAdapter.java:251)
E/AndroidRuntime(12939):	at com.quoord.tapatalkxdapre.adapter.forum.LatestTopicAdapter.<init>(LatestTopicAdapter.java:70)
E/AndroidRuntime(12939):	at com.quoord.tapatalkxdapre.activity.controller.LatestController.tabChange(LatestController.java:271)
E/AndroidRuntime(12939):	at com.quoord.tapatalkxdapre.activity.controller.LatestController.access$3(LatestController.java:231)
E/AndroidRuntime(12939):	at com.quoord.tapatalkxdapre.activity.controller.LatestController$2.onTabChanged(LatestController.java:217)
E/AndroidRuntime(12939):	at android.widget.TabHost.invokeOnTabChangeListener(TabHost.java:379)
E/AndroidRuntime(12939):	at android.widget.TabHost.setCurrentTab(TabHost.java:364)
E/AndroidRuntime(12939):	at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:150)
E/AndroidRuntime(12939):	at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:540)
E/AndroidRuntime(12939):	at android.view.View.performClick(View.java:3631)
E/AndroidRuntime(12939):	at android.view.View$PerformClick.run(View.java:14332)
E/AndroidRuntime(12939):	at android.os.Handler.handleCallback(Handler.java:605)
E/AndroidRuntime(12939):	at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime(12939):	at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(12939):	at android.app.ActivityThread.main(ActivityThread.java:4517)
E/AndroidRuntime(12939):	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(12939):	at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(12939):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:985)
E/AndroidRuntime(12939):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:752)
E/AndroidRuntime(12939):	at dalvik.system.NativeStart.main(Native Method)

I noticed that I had about 50 MegaBytes of cache of the app. I deleted it and the problems seem to got fixed. But I don't think this is related to the cache size, that's why I posted it here.