I just put my epub draft (which is now working in all devices) through the validator at:
http://validator.idpf.org/
and it returned a "Warning" with the following message:
"item (iTunesMetadata.plist) exists in the zip file, but is not declared in the OPF file"
Any ideas what this means? And should I worry?
I'm afraid I don't quite yet know where to start when it comes to editing anything in the zip file. Mainly I'm not sure what to use to do this, and how I would go about making sure the revisions take, i.e. saving the new document and re-zipping(?) the file.
I'm on a Macbook Pro, running Snow Leopard, if it helps.