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Mine is 2.0.00.09180 also.
Very much interested in your results. My upgraded PRS500 worked great, except the battery discharges itself after a full charge in little more than a week when not used at all. A change in battery made no improvement.
No regrets in going for the upgrade, but it would be nice not to have to constantly recharge the thing. Or at least to know why the drain is occuring.
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