title: java.lang.ClassNotFoundException on working app
body: <p>I have created and published my first Android app. It's very simple. It works fine on simulator and some phones, but I am getting this error:</p>
  
  <pre><code>java.lang.RuntimeException: Unable to instantiate application cz.teamnovak.droid.Novak ESC Track guide: java.lang.ClassNotFoundException: cz.teamnovak.droid.Novak ESC Track guide in loader dalvik.system.PathClassLoader[/data/app/cz.teamnovak.droid-1.apk]
      at android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:649)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4232)
      at android.app.ActivityThread.access$3000(ActivityThread.java:125)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2071)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:123)
      at android.app.ActivityThread.main(ActivityThread.java:4627)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:521)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
      at dalvik.system.NativeStart.main(Native Method)
  Caused by: java.lang.ClassNotFoundException: cz.teamnovak.droid.Novak ESC Track guide in loader dalvik.system.PathClassLoader[/data/app/cz.teamnovak.droid-1.apk]
      at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
      at android.app.Instrumentation.newApplication(Instrumentation.java:942)
      at android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:644)
      ... 11 more
  </code></pre>
  
  <p>Any idea what can cause this?</p>