i dont think i have a text since i check all the time and the theres no indicator on the sms icon.
i havent had a secondary sms app in a while so its not those. it could be email but ive have 1000 unread stuff and its never had that icon before...could it be a picture message or something that wont go through because of at&t?
Do you have status notifier or intelliscreen? Sometime the badge will read zero but you will still have the icon at the top. Go into all of your text apps and see if there's one unread.