Does anyone know what's happening with WHYY? Last night when I tuned to channel 12.1 the set was re-directed to channel 99. There was no picture or sound on channel 99. This morning when I tuned channel 99 the set was re-directed to channel 12. There is a picture on 12.1 and a blank screen on channel 12.4. WHYY usually broadcasts on 12.1 and 12.3. Any one have any idea as to what is happening? Thanks.