Bug 305375 [ui] Many dialogs about unavailable sites
I20100309-0100 I ran a "Check for Updates" immediately after my machine had come out of standby. I don't think the wireless had fully connected yet, and the check for updates failed (fine). However, I got a half dozen nested dialogs about each of the sites that it could not find. They were all stacked on top of one another, and I had to dismiss each one individually. I would expect it to accumulate this into a single dialog rather than one dialog per repository.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
return resultInstances;
	}
	/**
	 * @return the viewer
	 */
	public Viewer getViewer() {
		return structuredViewerManager.getViewer();
	}
	
	/**
	 * Get our preferences
	 */
	static IEclipsePreferences getPreferencesRoot() {
		IEclipsePreferences root = (IEclipsePreferences) Platform.getPreferencesService().getRootNode().node(
				InstanceScope.SCOPE);
		return (IEclipsePreferences) root.node(NavigatorPlugin.PLUGIN_ID);
	}
	
	
	static void flushPreferences(IEclipsePreferences prefs) {
		try {
			prefs.flush();
		} catch (BackingStoreException e) {
			IStatus status = new Status(IStatus.ERROR, Platform.PI_RUNTIME, IStatus.ERROR,
					CommonNavigatorMessages.NavigatorContentService_problemSavingPreferences, e);
			Platform.getLog(Platform.getBundle(NavigatorPlugin.PLUGIN_ID)).log(status);
		}
	}
}