Hum, I used to get a tempering alloy (i.e., the golden blacksmithing temper) once every couple of weeks from my hireling, but now I can't remember the last time I got one in the mail, it must have been at least a couple of months (I have spent all 3 points in the miner hireling).
I understand that those tempers are supposed to be rare, but I think the frequency has been decreased a tad too much!
Coincidentally or not, my hireling stopped sending those tempers when the messages stopped being updated (when you keep getting the same old message about how happy she is). I wonder if the two things are correlated or not. Alternatively, it could have something to do with some change that came around with patch 1.6 or a bit earlier than that?