I can't help with the iphone upload, since I don't have one. But it is kind of unusual for the later tomatoes to taste worse than the first, usually it's the other way around with early season tomatoes sometimes not quite having the full flavor.
Is it possible that you started babying them and watered them more often when you realized how good the first ones were? Too much water will dilute the taste. Or has the weather changed and become cooler in the last few weeks? Hope someone else can add some other causes.
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Dee
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