Bug 61713 MessageDialog can't be created in non UI thread anymore
I20040511 In the past it was possible to create a MessageDialog from non UI threads. This is not possible with I20040511 anymore. Doing so now results in an invalid thread access to due the fact that the images are now managed by SWT.
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/ImageRegistry.java
protected Image image;
		protected ImageDescriptor descriptor;
	}
	private Entry getEntry(String key) {
		return (Entry) getTable().get(key);
	}
	private void putEntry(String key, Entry entry) {
		getTable().put(key, entry);
	}
	private Map getTable() {
		if (table == null) {
			table = new HashMap(10);
		}
		return table;
	}
}