Awoke to a spinning hour glass on my home screen and 250+ messages. Typically I have about 25. Pulled battery. Upon restart still initial white screen came up with "JUM Error 529" and gave me the option to continue. I continued and the phone came online - all but the 4GB Micro SD card. Any apps that require the card failed.
Address Book, Contacts, Notes. Gonna try to format the card with the BB then reinstall card data from my last mem card backup.
Thanks. I did see that one. It was a different error code and his experience was different than mine. I doesn't appear that I need to wipe it. I'm going to try just rebuilding the card first.