Return shows as accepted, almost 3 weeks now, but IRS page hasnt given anticipated Deposit date yet. Why?

My Fed was accepted 1/25. State accepted 1/29. I understand that Fed wasnt being accepted by IRS until 1/29.  When checking the IRS Wheres My Refund site, it shows it as accepted and has the canned message saying 21 days yada yada yada.. In years past, after 3-4 days of showing it was accepted, it would then update to give me a date that I can expect it to be deposited.  It hasnt updated to that yet, well over 2 weeks later.  Why? I havent received anything in the mail or email stating there was an error on my forms that were filled out..