Exact same issue as gotten. Cleared cache & data, force stop, reboot, unmount/remount sd card. No joy. I'm on a Sprint Samsung Galaxy 3. Just started with the 4.3 Jelly Bean upgrade.
mine started this morning - tried every idea listed here, even force stop/ clear data/ disabling downloads. goes away and then starts over in a little bit. so annoying, plus it seems to be draining my battery like crazy