I've been through two packs of Kentona and I won't bother with it again. The first pack obviously had emulsion defects because there was a pattern of spots on every print in the exact same location on each piece of paper. It didn't matter which negative and if I tried other papers, the spots weren't there.
The second time around was this past summer. After I finished my printing session I noticed that the borders were yellow and so were the highlights. I mixed fresh fix for that session and followed my routine as I always do so I didn't know what to think until I read somewhere later that warm temperatures have an effect on Kentona. I haven't been able to find that article or thread or whatever it was I read, though.
Regardless, I'm done with it. There are too many other papers I like to continue to waste money on one that doesn't work for me.