I don’t know, if it is a bug or if I only need a special solution.
In 2007 or 2008 I reworked the Windows Vista fonts Constantia, Cambria etc.
Now I want to open the Fonts again to rework it once more (the space between the characters is too small). But now a strange error message occurs:
I’m not sure if you’re allowed to make modifications to these fonts, but I assume you’ve taken care of that.
Did you make these changes with FontCreator? When do you see the error appear?
Can you send a copy of one of these fonts directly to me? I’ll see if I can identify your problem. The font is only used for the purpose of reproducing and understanding the reported problem.