Hi,
I've put all my fonts into font collections for platform support. I found an issue here: I have a very small font (just some monospaced digits and extra characters for table listings). They are perfectly ok in the source, but some digits are ultimately cut off at the bottom in the final atlas. Further more, there are some tiny artefacts showing up in between. Please see the marked sections in the atlas.
Source font graphics from bmglyph:
Generated font collection atlas with tiny artefacts and cut-offs:
Collection padding is set to Default. Haven't seen such artefacts before, maybe onyl introduced with the latest beta? I recreated the fonts today with the latest version from yesterday installed...
Regards, habitoti