Is your camera app stored on your external SD? If so, it shouldn't be. It needs to be on your internal SD.
Did you leave the external SD card in when upgrading? If so, I would have removed it.
When you upgraded, did you wipe the device? If not, I would try re-flashing with a clean slate.
Or, copy all your data off your external SD card, then try reformatting the SD card, then copy your data back. Might be a corrupted file or something on there too.