null pointer exception

My app, Knots 3D, has been on the Android Market for over 3 months. Today I saw my first error reported in the Developer Console. See below:

[blockcode]
java.lang.NullPointerException
at com.ansca.corona.ViewManager$19.run(ViewManager.java:550)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3835)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)
[/blockcode]

The app is on Build 767.

Any ideas? [import]uid: 17130 topic_id: 25043 reply_id: 325043[/import]