Originally Posted by ShellShock
Yes it is most but not all; but there must be something in the actual font-files themselves which means italics work or do not work. This gives me hope that this is something we can fix ourselves (by tweaking the fonts), especially as some side-loaded fonts DO work.
They did work in 2.1.5., they don't in revisions since. Breaking sideloaded fonts is understandable (Kobo can't test for every known font) but breaking included fonts is simply sloppy. By all means explore all avenues to circumvent for yourself (I simply chose a different sideloaded font that does work), but something has fubar'd that rely on the developers, not the user, to fix.