Ha ha – well, they didn’t have it in the Renaissance either (from when the original metal types that my fonts are based on were made)! Maybe I should just delete all my kerning, etc. and make them really authentic? 
A workaround is to paste the Greek glyphs to the Latin code-points in a new font, run autometrics there, then copy/paste the glyphs with their new metrics using paste special.
Hmm… that sounds like an interesting solution – although I have the entire extended Greek character set, too (233 characters, on top of the basic Greek, if I remember correctly) so I’m not sure where I would paste them to.
Well, I think I’ll just leave it as it is for now – I’m not sure how often that Greek character set will get used (for my own purposes, anyway) and so perhaps it’s not that big a deal. That’s something I could backburner for now, anyway, just to finally get this all done and out of the way, but maybe I can go back to this and try that out down the road.
Or maybe in the meantime FC will also get the ability to autokern (etc.) Greek! That would be even lovelier. 
In the meantime, though, I found this weird ebook bug a bit more disconcerting – I suspect that the issue isn’t with my font, though, but rather with the ebook software? I don’t know. Wish there was something I could do about that one, though.