I also recently used the kolsh yeast in an oktoberfest, and an early taste also to me tasted very cherry-like. Upon reading about this yeast, it is very lager-like and maybe produces esters if temp is too high. My temp was probably alittle high, but not crazily so. I'm hoping that as always time will bring good beer, I tested after six days and not again since. carb was good, but very cherry-like. Kolsh isn't very fruitly traditionally, so maybe someone can shed some light.