I`m referring to this thread: the way the cost calculator treats the cost of unit class #44 and #243
http://forum.shrapnelgames.com/showthread.php?t=50755
What I meant by very same unit, is that if you take a fighter bomber (any) and change the class of that very unit to ground attack #243 the cost calculator changes it`s cost.
According to the notes for patch v9 this was corrected, but it seems that in v10 it was changed back again.
[Edit]
But before you go crazy (because you haven`t touched the cost calculator for this patch)... I`ve just checked. It seems that you`ve forgot to implement it in v9 or maybe it was in v9.0 but not in v9b)
Cheers