Houston viewers now have their sixth digital OTA station. KTXH-DT must have come on the air either this morning (4/30) or yesterday. The UPN affiliate can be found on channel 19-1.
Last I looked KTXH-DT was repeating KTXH-TV (channel 20) in a format very slightly wider than 4:3. The quality of the line doubled standard definition image was also very good. I was getting an S/N of 94 which is one of the highest numbers for any of the Houston digital stations.