Thanks, that gives me something to look at. I believe this is the relevant part of FontForge:
http://fontforge.sourceforge.net/fon...ml#TTF-Metrics
But I can't say I'm being successful at fixing it. Maybe it's only because Opera doesn't reload the font file when it changes, but I've tried changing the filename every time too.
Could you change the two files in the sample ePub (regular and italic) and upload them? Maybe if I see the differences I can learn something.
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Nevermind, I did it. I changed all offsets to 0 (they had some seemingly random values).