Inconsistencies with letter a.

[sarll]

These three letters have the same spacing and, for spacing purposes, the same shape on the right side. However, kern-on insists on giving 'a' a significantly tighter kerning when combined with other characters. If I try to adjust it, kern-on starts saying it's conflicting other pairs and forcing me to set is as independent. Is this something deliberate or am I doing something wrong?

[Tim Ahrens]

This is strange. Maybe the right side of the a has special spacing (or, n and u have special spacing)?

You can also send me the file if you don’t mind, then I can have a quick look myself.

[sarll]

Thanks for your response, Tim. Please, let me know what's your preferred way to send you the file.

[Tim Ahrens]

You can send it to me by e-mail (see the footer on https://kern-on.com/). Thanks!

[Tim Ahrens]

Thank you for sending the file.

There seems to be a bug in the latest cutting-edge Glyphs version (3316). With Glyphs 3260 (the current stable version) and with Glyphs 3300 (this is just a somewhat older version I have) I am getting the expected, consistent Kern On behaviour in a, n and u.

Also, if I decompose the cap components used for the serifs, I am getting the expected, consistent Kern On behaviour.

In other words, there seems to be a recently introduced bug in Glyphs. Kern On calls GSLayer.copyDecomposedLayer and GSLayer.flattenOutlinesRemoveOverlap. Apparently this does not correctly decompose caps in Glyphs 3316.

Maybe Georg can shed more light on this.

[sarll]

Thanks for taking the time to look into this!

[Tim Ahrens]

Good news! The bug in Glyphs has been fixed. If you update to the latest cutting-edge Glyphs version (or use the latest stable version) things should work as expected.