Not having this problem, but mine does not keep time no matter what and I have been meaning to post about it. I've had this problem with the player since I bought it 2 years ago. I checked that FAQ entry and none of those apply so I probably do need to contact support... although it's just a clock and not really much to get twisted over.
If I set the time, the next day when I start the car, it will say either Jul-1-2001 or something like Jan-11-2036 (not sure about the Jan 11 part but the year is always 2036).
I was having this trouble with 2.00 final (and betas) and then when I switched to 3.00 a7, the time actually seemed to stay corrected for a couple of days, and then about a week later i looked at it and again it showed the above symptoms. So I don't know what happened there. I'm not using a tuner so RDS is not a factor and I've set the correct time zone and all that.
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One of the last MK2's from SonicBlue...
Blue/60gig
S/N: 030103111