some wrong spacing in opentype compared to type1
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philthelion
When using TeX there is a typesetting issue with integrals in math mode where the super- and subscripts are to far off the integral sign when using the opentype version of libertine. The spacing is correct when using the type1 versions of libertine.
See this screenshot I provided on the lualatex bug tracker. Left side is showing lualatex using opentype fonts, right side is pdflatex using type1 fonts.
Matthias
I don't have anything handy to test math mode, but you might review if this issue has been addressed in the Libertinus fonts fork. There is a new OpetType math companion font as well with many glyph issues sorted out for use in math typesetting. If you check it out and there is a problem still please feel free to open a bug report against Libertinus on the GitHub issue tracker and I'll take a look.
A bit of a test drive suggests that this issue with integrals is not present when using Libertinus Math.