LSB miscalculated in TTF export
The LSB value in the hmtx table is miscalculated when exporting TTFs which have off-curve points as the leftmost point ...
See attached example TTF, both glyphs,
/a, have a LSB of 30 in the hmtx table, but for
/ait should be about 13.
This causes the outlines in the exported TTFs to shift noticeably to the right.
its seems to be a fontTools issue :)
it seems to recalculate the bounds from all points instead of analysing the bounds of the contour
(this will be fixed in the next version...