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
* org.eclipse.ui.internal.navigator.INavigatorContentService#restoreState
	 * (org.eclipse.ui.IMemento)
	 */
	public void restoreState(final IMemento aMemento) {
		synchronized (this) {
			List runnables = new ArrayList();
			for (Iterator extensionItr = getExtensions().iterator(); extensionItr
					.hasNext();) {
				final NavigatorContentExtension element = (NavigatorContentExtension) extensionItr
						.next();
				ISafeRunnable runnable = new ISafeRunnable() {
					public void run() throws Exception {
						element.restoreState(aMemento);
					}
					public void handleException(Throwable exception) {
						NavigatorPlugin.logError(0,
								"Could not restore state for Common Navigator content extension" 
										+ element.getId(), exception);
					}
				};
				runnables.add(runnable);
			}
			for (Iterator iterator = runnables.iterator(); iterator.hasNext();) {
				ISafeRunnable runnable = (ISafeRunnable) iterator.next();
				SafeRunner.run(runnable);
			}
		}
	}
	/*
	 * (non-Javadoc)