Concerning FOX and PBS.
FOX ,
http://transition.fcc.gov/fcc-bin/tvq?call=WTXF-TV.
And
http://en.wikipedia.org/wiki/WTXF-TV.
Are showing FOX on Real UHF Channel 42 and virtual channel (29.1).
PBS ,
http://en.wikipedia.org/wiki/Maryland_Public_Television ,
on Real UHF channel 29 , Virtual channel (67.1).
FOX on Real UHF channel 42.
PBS on Real UHF channel 29.
No conflict.