Mingus Trackback Bug – please help.

Hi all ??
I know there is a really quick fix to the 1.2 mingus trackback bug somewhere on these forums, but I can’t find the damn thing. I understand that 1.21 fixed this problem (did it?) but I’m waiting for 1.3 to coincide with a redesign on my part.
Can someone pleeeeease help me out. It’s a two line fix, I just wish I had bookmarked it the first time!
Thanks,
Andrew.