I can confirm that USB transfers using Win2k on my PC are also about twice as fast as using Win98 (in fact serial transfers are also noticably faster on Win2k). I also saw most of my sync errors disappear when I moved to Win2k (I almost never get an error with the latest release).

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Unit serial number 47 (was 330 in the queue)...
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Remind me to change my signature to something more interesting someday