Old-style numerals/small caps support?

I embedded a subset font* with small caps and old style numerals in an ePub, which displayed fine in Sigil and ADE, but I when compiled it with the latest version of KindleGen, the embedded font seems to be ignored on my K3. (Turning Publisher Fonts on/off had no effect either.)

Is this yet another limitation of the KF8 firmware of my K3 or do eInk Kindles generally not support embedded fonts that replace small caps and/or (old-style) numerals?

[*] a subset font of AnPolt-Regular created with Font Squirrel. (Other subset fonts didn't work either.)

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Image may be NSFW. Clik here to view.	sc_test.mobi (49.5 KB)
Image may be NSFW. Clik here to view.	sc_test.epub (13.1 KB)