I don't know if this helps, but how do you store your paper? In the darkroom, or outside it? Keeping them in the darkroom can contaminate them.
I've had the same problem juan is mentioning with Kentona. With Bromide I've only had the odd speck of yellow, but guess what, that was from not washing the prints properly.
My darkroom has been anywhere from 67*F to 75*F, representing the chemistry temperature at the time too.
I've used the same A130 / TF4 combination as you, with the difference that I didn't selenium tone.
- Thomas