Bug 389118: messagepane content not cleared when opening saved search folder with no matches; p=Bruno Escherl <aqualon@aquachan.de>, r=me, sr=bienvenu

mailnews/base/resources/content/msgMail3PaneWindow.js

@@ -229,7 +229,9 @@ var folderListener = {
            if (uri == gCurrentLoadingFolderURI) {
              viewDebug("uri == current loading folder uri\n");
              gCurrentLoadingFolderURI = "";
-             if (!scrolled)
+             // scroll to message for virtual folders is done in 
+             // gSearchNotificationListener.OnSearchDone (see searchBar.js)
+             if (!scrolled && !(gMsgFolderSelected.flags & MSG_FOLDER_FLAG_VIRTUAL))
                ScrollToMessageAfterFolderLoad(msgFolder);
              SetBusyCursor(window, false);
            }

mailnews/base/resources/content/searchBar.js

@@ -97,8 +97,10 @@ var gSearchNotificationListener =
           vFolder.updateSummaryTotals(true); // force update from db.
           var msgdb = vFolder.getMsgDatabase(msgWindow);
           msgdb.Commit(MSG_DB_LARGE_COMMIT);
-          // now that we have finished loading a virtual folder, scroll to the correct message
-          ScrollToMessageAfterFolderLoad(vFolder);
+          // now that we have finished loading a virtual folder,
+          // scroll to the correct message if there is at least one.
+          if (vFolder.getTotalMessages(false) > 0)
+            ScrollToMessageAfterFolderLoad(vFolder);
         }
     },