and I cannot reproduce the kerning issue... are you sure the 'a' is not in some group kerning?

Like a charm. Thanks a lot!

even better: control-click your ufo and select "show package contents"

The kerning keys can be either glyph names or group names. If they are group names (starting with an @) you can edit them in with the groups objects f = CurrentFont() f.groups["@MMK_L_f"] Its possible that this group isn't not in your groups but already hard coded into the features. (normally MM is adding those kerning groups also as font.groups items) note: RoboFont does not automatically convert font.groups to feature groups. Use this extension for converting and adding groups to the feature file: http://github.com/typemytype/RoboFontExtensions/tree/master/groups2Features good luck

that is easy too :) from mojo.events import addObserver class RenameGroupsObserver(object): def __init__(self): addObserver(self, "checkGroupNames", "fontDidOpen") def checkGroupNames(self, info): print "checking group names for single quotes" font = info["font"] for groupName, items in font.groups.items(): newItems = [] for glyphName in items: if "'" in glyphName: glyphName = glyphName.replace("'", "") newItems.append(glyphName) if newItems != items: ## something changed font.groups[groupName] = newItems print "done checking group names" RenameGroupsObserver() save this script in a file and add it in the preferences as a start up script and you never ever have to worry about single quotes in groups. see http://doc.robofont.com/documentation/workspace/preferences/extensions/ Your font data will change and importing the UFO back in FL will change the groups behavior, off course good luck

@! got it! everything super. thank you very much.

Hi there, The groups created in RF are used as "reference groups" in MM, right? Why not directly as 'standard' groups usable for kerning?

That helps! Thanks. :)

yeah, they will also get a "Cancel" button, so the changes will not be performed on the font.groups.