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
.size()]);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @seeorg.eclipse.ui.internal.navigator.INavigatorContentService#
	 * createCommonContentProvider()
	 */
	public ITreeContentProvider createCommonContentProvider() {
		if (contentProviderInitialized) {
			return contentProvider;
		}
		synchronized (this) {
			if (contentProvider == null) {
				contentProvider = new NavigatorContentServiceContentProvider(
						this);
			}
			contentProviderInitialized = true;
		}
		return contentProvider;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @seeorg.eclipse.ui.internal.navigator.INavigatorContentService#
	 * createCommonLabelProvider()
	 */
	public ILabelProvider createCommonLabelProvider() {
		if (labelProviderInitialized) {
			return labelProvider;