It's a Sandisk. The app that keeps closing is Facebook. Cleared cashed, uninstalled, reinstalled, still force closes.
Sent from my NookColor CM7 7.1 on SD
Good news out of XDA it looks like the Nook Colors and Tablets support 64GB SDXC cards without out any sort of modification other than having to format the card on the Nook itself.
Yeah baby! The wife is gonna love that news. ;D
But your pocket book might not