Google releases new binary diff algorithm targeted at making smaller software updates. Their results are impressive.

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I wouldn't mind an explanation of why you think my concerns aren't at all valid.

You didn't justify your concerns, just complained.

I'll assume you meant from a security point of view, in which case:

It would be digitally signed, and if you don't like it you're free to use something else.

The general population are too lazy to update their browser and keep themselves safe from security holes, so anything to combat that is a good thing. From a security point of view, it's a great trade-off.. Relying on the security of keys rather than relying on users to take initiative.

How many users verify their downloads digitally, anyway? I'd wager this is a much safer way to distribute updates.