Wondering about the epubcheck version. It seems the latest is 3.0.1 (there is a 4.0 version but it's a Beta). I did a quick test with Warnock Pro and run it through epubcheck 3.0.1 and get no warnings. Can you post a small sample so we can test it?
I'm getting the same error with AGaramond Pro on another book today. The books both uploaded thru iTunes Producer to iBookstore without error though. I'm thinking it is the little js application called ePubCheck_3.0b5 (for Mac).
Here is one chapter from the previous book though in epub 2. (that seemed to work better).
Umm. Hmm. I don't know how to attach it. Oh wait. Here's my public folder:
I don't get any error. I use this app: pagina GmbH Publikationstechnologien: EPUB-Checker You just drop the file on it and get the result. It's in German but if you scroll down a bit you'll see the instructions in English.
Thanks Ellis home. That's very helpful! Good to know that it's not the fonts or my epub file.
You have an old version of epubcheck. You should be using v3.01, which is available here (scroll down past the link to the 4.0 beta):
Or, pagina's epubChecker is also good: