You're marketing a version of your product which is compared against a carton of milk. I tend to think that when you're marketing a browser you should regard them as valuable cars, as you wan't to build up some goodwill among your customer base.
If your customers regard your browser as a carton of milk which basically is just a carton of milk - a product that's fastly consumed - then what makes them to connect to your product (in this case, an internet browser)? Will it build goodwill?
What if mercedes benz announced that their old products are just tin cans - and that you probably wouldn't want to keep old tin cans laying around - what kind of a message would the company be conveying to the customer in view of their product?
If microsoft itself views the explorer product family as cartons of milk and also conveys a clear message of it through its own marketing - then, in my opinion, as brutal as it sounds, it's time to rebrand the product. Even when you're publishing a new version of the product, essentially, you'll just be publishing a prettier carton of milk.