If I understand all the comments correctly, this appears to be a bug in FontForge, reporting warnings for things that are actually standard practice, rather than a bug in the Ubuntu font. Please reopen if I've misunderstood.
If I understand all the comments correctly, this appears to be a bug in FontForge, reporting warnings for things that are actually standard practice, rather than a bug in the Ubuntu font. Please reopen if I've misunderstood.