Nothing really out of the ordinary. Slacker Radio was the most recent on Sunday I think. This error began today on the initial bootup after I installed my sd card.
I'm also noticing that when I go into my Messages App, I am unable to scroll through my messages to highlight/select them to read.
I am using the Today theme - when I am on the main screen, and try to select my new messages, I get the white screen and App Error 523
Is there a listing of these codes to help explain what they mean?
For grins, try to ditch the today theme and try another instead. That failure has been linked to themes (typically 3rd party ones however) or other software that created conflicts. It's worth a shot before you wipe it cuz that appears your next option. Do a battery pull after changing themes too just to be sure. Then let it restart with the new theme running and see what happens.