is the yellow tone there while the print is still wet, or only after it has dried? Is it only in the dark tones, or uniformly yellow from the shadows to highlights?
I used Kentona for only a couple printing sessions, but from what I can remember, it is slightly purple, not yellow. The only things I can think of is that it is a bad batch of paper, as someone else has suggested, or there is some contamination someplace in the process. Is it possible to post a scan in this thread so we can see what the problem is. I don't think it is the bromide; I tend to use a lot of it, and didn't have that problem.