Anyone else having antenna issues with Sirius? I've had my Karma for just over three weeks and about once a week when I start up the car in the morning I get an antenna connection error that is impossible to dismiss. I've tried making phone calls and playing audio over Bluetooth, but to no avail. I haven't yet figured out how to turn off the radio completely while the car is on (anyone?). After a recharge at night the problem disappears. Really annoying.