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An audible.com subscription is not time sensitive so changing the clock should not have freaked it out. However, I suspect that this may be an "undocumented feature" of the Cowon D2 2.51 with audible.com. Although this is a new feature for the Cowon D2, I must say that except for that incident, it seems to be working fine. It does not lose its way with multiple starts and stops and responds well to audible breakpoints. I also find that navigation with the touch screen is actually less hazardous than the iRiver rocking screen method.