You need (on 2.0b3) to switch to mp3 mode and back in order to force the line on again.

OK. That sounds like a software issue though - not hardware (?). Either way, FITNR - yay! Thanks.

... some (transistor controlled?) antennas don't retract when you switch from tuner mode to mp3 mode ...

Ahh, also OK, I suspect. Two issues. As for me, my car antenna is rather stationary.