下面的详细信息，但基本上我试图了解我的 Droid 上是什么引发了这个错误。
详细信息：我正在尝试跟上 C2DM 的速度。我正在测试使用 Urban Airship 的推送通知服务（到目前为止，IMO 非常酷）通过 C2DM 向在 Android 上运行的应用程序发送通知。
我的 Droid（运行 Android 2.2.2）不显示通知，每次我认为设备上收到通知时，我都会看到写入 LogCat 的堆栈跟踪。
我不知道是什么生成了堆栈跟踪。我确实知道每次我通过 Urban Airship 的网站向设备发送推送通知时都会生成它。
我相当肯定我的 C2DM、Urban Airship 和 Android 应用程序配置正确，因为我可以在 Android 模拟器上使用相同的应用程序和 Google 帐户成功接收并显示通知。仅供参考 - Android 应用程序是 Urban Airship 的示例 android 推送应用程序，使用我的配置信息进行编辑。
由于它在 Android 模拟器中工作并且在我的实际设备上失败，我假设我的设备有一些东西导致它失败。因此对下面的堆栈跟踪感兴趣。
11-11 16:15:28.894: E/TalkProvider(4433): query db caught
11-11 16:15:28.894: E/TalkProvider(4433): java.lang.IllegalArgumentException: the bind value at index 2 is null
11-11 16:15:28.894: E/TalkProvider(4433): at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:234)
11-11 16:15:28.894: E/TalkProvider(4433): at android.database.sqlite.SQLiteQuery.bindString(SQLiteQuery.java:182)
11-11 16:15:28.894: E/TalkProvider(4433): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:48)
11-11 16:15:28.894: E/TalkProvider(4433): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)
11-11 16:15:28.894: E/TalkProvider(4433): at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:330)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.talk.TalkProvider.queryInternal(TalkProvider.java:1740)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.talk.TalkProvider.query(TalkProvider.java:1436)
11-11 16:15:28.894: E/TalkProvider(4433): at android.content.ContentProvider$Transport.query(ContentProvider.java:163)
11-11 16:15:28.894: E/TalkProvider(4433): at android.content.ContentResolver.query(ContentResolver.java:245)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.DatabaseHelper.getOffTheRecordCursor(DatabaseHelper.java:756)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.ChatSession.queryOtrCursor(ChatSession.java:206)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.ChatSession.<init>(ChatSession.java:168)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.ChatMgr.createChatSession(ChatMgr.java:264)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.ChatMgr.processIncomingMessage(ChatMgr.java:721)
11-11 16:15:28.894: E/TalkProvider(4433): at com.google.android.gsf.gtalkservice.ChatMgr.processPacket(ChatMgr.java:521)
11-11 16:15:28.894: E/TalkProvider(4433): at org.jivesoftware.smack.PacketReader$ListenerWrapper.notifyListener(PacketReader.java:1860)
11-11 16:15:28.894: E/TalkProvider(4433): at org.jivesoftware.smack.PacketReader.processListeners(PacketReader.java:451)
11-11 16:15:28.894: E/TalkProvider(4433): at org.jivesoftware.smack.PacketReader.access$200(PacketReader.java:91)
11-11 16:15:28.894: E/TalkProvider(4433): at org.jivesoftware.smack.PacketReader$3.run(PacketReader.java:154)
11-11 16:15:28.894: E/Smack/Packet(4433): [PacketReader] listenerThread: caught exception
11-11 16:15:28.902: E/Smack/Packet(4433): notify conn error. close connection!
11-11 16:15:28.902: E/Smack/Packet(4433): java.lang.NullPointerException
11-11 16:15:28.902: E/Smack/Packet(4433): at com.google.android.gsf.gtalkservice.ChatSession.queryOtrCursor(ChatSession.java:208)
11-11 16:15:28.902: E/Smack/Packet(4433): at com.google.android.gsf.gtalkservice.ChatSession.<init>(ChatSession.java:168)
11-11 16:15:28.902: E/Smack/Packet(4433): at com.google.android.gsf.gtalkservice.ChatMgr.createChatSession(ChatMgr.java:264)
11-11 16:15:28.902: E/Smack/Packet(4433): at com.google.android.gsf.gtalkservice.ChatMgr.processIncomingMessage(ChatMgr.java:721)
11-11 16:15:28.902: E/Smack/Packet(4433): at com.google.android.gsf.gtalkservice.ChatMgr.processPacket(ChatMgr.java:521)
11-11 16:15:28.902: E/Smack/Packet(4433): at org.jivesoftware.smack.PacketReader$ListenerWrapper.notifyListener(PacketReader.java:1860)
11-11 16:15:28.902: E/Smack/Packet(4433): at org.jivesoftware.smack.PacketReader.processListeners(PacketReader.java:451)
11-11 16:15:28.902: E/Smack/Packet(4433): at org.jivesoftware.smack.PacketReader.access$200(PacketReader.java:91)
11-11 16:15:28.902: E/Smack/Packet(4433): at org.jivesoftware.smack.PacketReader$3.run(PacketReader.java:154)
11-11 16:15:28.902: D/Smack(4433): [XMPPConn] close connection, notifyClosed=false