Bug 484320, r=dveditz, sr=mrbkap, a=blocking1.9.1

layout/xul/base/src/tree/src/nsTreeSelection.cpp

@@ -268,6 +268,8 @@ nsTreeSelection::nsTreeSelection(nsITreeBoxObject* aTree)
 nsTreeSelection::~nsTreeSelection()
 {
   delete mFirstRange;
+  if (mSelectTimer)
+    mSelectTimer->Cancel();
 }
 
 // QueryInterface implementation for nsBoxObject