So you weren't patient enough to wait for a rooted version of EB13 Froyo for your Sprint Epic 4G and flashed the official version from Sprint. I can't blame you; I would have done the same darn thing, and so did Android Central Epic 4G forums moderator ragnarokx. Luckily, he took the time to verify the root method and write it up for everyone to use.
So if you just couldn't wait, and are already tired of looking at the Nascar app, or want to fire up Titanium Backup to restore some apps, head into the forums and follow the instructions. Be sure to tip you hat and tell ragnarokx thanks for getting this one sorted so quickly. [Android Central forums]