I am also noticing an issue with ‘Merge All Edges’ not working. I have a very simple mass that came from a city file, but it is very clean and everything appears to be rectilinear and straight, but still I can’t get rid of the kinks on some of the straight edges.
I noticed the problem when I was trying to scale from the bottom midface and the midpoint appeared to be off by a little. No matter what I try I cannot get rid of the kink along the bottom edge without manually rebuilding the geometry.
Using ‘Solid Point On’ I can’t see any vertices for the kink, but you can see in the attached image that when I ‘Dup Edges’ and turn on points for curves there are vertices for all the kinks. If I run a ‘Simply Curve’ on those it gets rid of all the kinks. I thought ‘Merge All Edges’ should have the same effect, and it always has for me, but this one will not fix for some reason??