I did have a display problem as well.
Instead of a compass arrow, the right side of my display showed GPS data.
Once I was able to eject the CD, I reset the NAV, put in the NAV CD, and after about 20-30 mins, my NAV and clock had been reset.

All I did to "fix" this was pull the radio fuses (there are two of them) and wait a bit. Once the radio had powered down for a bit, the no eject glitch disappeared.

Hopefully for good.