Happened to me yesterday. 08 Legacy (non-GT) lights from Radio and AC turned off, AC was still working, Radio was working but oddly only the station i was on and i couldn't change the station or adjust volume. just could turn the radio on and off.
Turned off car and it fixed itself.
good thing Subaru doesnt have free loaners so i cant just drop it off and tell them to do some troubleshooting!