CacheTT and GPOS

Hi, all, has anyone seen this behaviour before?

I am working with a TrueType font that has an empty GPOS table in it. (not sure why, but I recall something about this being needed for kerning to work in certain apps? Maybe?)
Anyway, when I run CacheTT to generate VDMX, LTSH and hdmx tables, the GPOS table is apparently removed.

I haven't run anything except CacheTT, and the only difference aside from the 3 tables it should generate appears to be the removal of this 0 length table. I don't know why CacheTT would do this?


Jason C