Nothing like such "threats" to stir the community! :)
I hadn’t seen the images you attached (as I’m on digest) before, but now I finally had a look...
This isn’t my area of expertise at all, but I get the impression a real conversion has taken place here, like from 3rd-degree bezier curves to quadratic ones. Usually, that shouldn’t make a big difference, but your font has relatively few anchor points and very thin lines, so maybe it has in this case. Also, there is a best-practice way to set points, and I think deviating from that could have produced this effect.
My question for more knowledgeable people in here: Is it possible (on importing SVGs or on setting up a font) to choose conversion to OpenType (cube paths) i.s.o. to TrueType (quadratic curves)? If there is, that may solve the problem.