Bug 75200 [Decorators] Color and Font decorators dissapear in Package Explorer
3.0 M2 The CVS font/color decorations dissapear in the packages explorer, or do not apply to all the elements they should. I will investigate on our end, but this seems to be a package explorer problem since the navigator always shows these decorations correctly.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/ResourceToItemsMapper.java
if (existingMapping != item) {
					List list= getNewList();
					list.add(existingMapping);
					list.add(item);
					fResourceToItem.put(resource, list);
				}
			} else { 			
				List list= (List) existingMapping;
				if (!list.contains(item)) {
					list.add(item);
				}
			}
		}
	}
	/**
	 * Removes an element from the map.
	 */	
	public void removeFromMap(Object element, Item item) {
		IResource resource= getCorrespondingResource(element);
		if (resource != null) {
			Object existingMapping= fResourceToItem.get(resource);
			if (existingMapping == null) {
				return;
			} else if (existingMapping instanceof Item) {
				fResourceToItem.remove(resource);
			} else { 
				List list= (List) existingMapping;
				list.remove(item);
				if (list.isEmpty()) {
					fResourceToItem.remove(list);