Unfortunately the font palette also requires you to have the ability to drag and drop. But after going through ArcaOS documentation in the OS/2 help file, they changed the drag to the right button instead of the left...
As Dave said, OS/2 default for dragging was always MB2 (usually the one on the right).
Strangely enough dragging an icon into the font palette in ArcaOS does nothing, but fortunately dragging it into the original font view does install it.
You drag "fonts" (an abstract construct for "font settings") from the palette and drop them onto any UI bit you want to use them to display text; you drag font _files_ (not icons) to the "fonts" folder in System Configuration to have them installed and used by the system (i.e. before you can see them in the palette). The similarity in names may be confusing.
I opened up the font and it does nothing to OS/2, so it's exclusive to Microsoft's "OS/2 font table" that's still a part of Windows.
The problem reported seems to be in Windows (win32k.sys) handling of TTF files with a malformed/corrupted OS/2 table (an internal structure of the font file intended for use under OS/2). I would think Windos should ignore that, but hey... OTOH a TTF file with a corrupt OS/2 table is likely to not work, or stir trouble, depending on how well your OS/2 TTF driver (IIRC truetype.dll or freetype.dll) handles the corrupt data.