Hi,
I have been fighting with this problem on my Desktop PC (win7-32 bit, then win8.1-64 bit, now win10-64bit) for a long time now.
Many of my formulas, most notably those with a "cdot"-symbol but also others ("mline") have screwed up spacings, and I have no idea why.
They look normal when I load my documents on my business laptop. I tried to purge everything on my Desktop and reinstall, but no success.
There are workarounds of course - I can just use the "`" spacing character.
But that makes my formulas look weird on other platforms such as my business laptop.
I tried to change the font used in formulas (to STIX), but the problem seems unrelated to the font used.
Any hints would be appreceated.