Kerning Interpolation

Glyphs
1

Hi,

I am having a problem with kerning interpolation.

Some kern pairs just interpolate well, but others badly. They seem very fine in the preview but after exporting some pairs get messed up.

Take a look at this screenshot from indesign (I verified and the otf has in fact the wrong kern pairs)

http://cl.ly/image/3C222k0T3q06
(The extremes are the masters)

2

Do you have classes and all the small locks closed (from both sides)?

3

Bingo!
There was an unlocked kern pair

4

It might be helpful if Glyphs had feature (or just a script) that automatically compares kerning across masters and reports anything that will not interpolate correctly.

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