There is a known bug in 2.0b7 that behaves similarly to what you describe, but it is only intermittent.

Sometimes when I turn my car off and take the key out, my player continues to play (no tuner installed) but without benefit of amplifiers, which are powered down, as is my Sony CD player. If I press and hold the top button, the player goes into standby for the duration of the timeout (60 seconds) and then comes back on again. Pulling the unit out of the dash and re-inserting it will fix the problem some times, but not others. Leaving it out of the dash overnight has always fixed it.

Is this the bug you are referring to?

tanstaafl.