diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index 8c393888f3..167a6d83e7 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -2487,6 +2487,10 @@ static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
     event.SetEventObject(win);
     if ( !win->GetEventHandler()->ProcessEvent(event) )
     {
+        // windows must handle this event, otherwise the app wouldn't behave
+        // correctly if it loses capture unexpectedly; see the discussion here:
+        // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
+        // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
         wxFAIL_MSG( _T("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
     }
 }