액티비티내에서 핸들러를 이용해서 UI스레드에 접근하고 있습니다.

thread에서 데이터를 받아오면 핸들러를 통해서 ui를 업데이트 하게끔 해놓았는데요.

자꾸 이런에러가 들어옵니다. 어디가 문제인지 찾을수 있을까요?

java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131165243, class android.widget.ListView) with Adapter(class android.widget.HeaderViewListAdapter)]
at android.widget.ListView.layoutChildren(ListView.java:1492)
at android.widget.AbsListView.onLayout(AbsListView.java:1147)
at android.view.View.layout(View.java:7052)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:909)
at android.view.View.layout(View.java:7052)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:909)
at android.view.View.layout(View.java:7052)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
at android.view.View.layout(View.java:7052)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7052)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7052)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
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:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
at dalvik.system.NativeStart.main(Native Method)