Help required with error message from Apple

[verydeepwater]

Received the following error message after uploading a fixed layout epub 3 to apple.

Unable to authenticate the package:
ERROR ITMS-6015: "xxx.epub: Option specified fonts is not a recognized display option for default platform or for platform *" at Book (MZItmspBookPackage)
ERROR ITMS-6015: "xxx.epub: auto is not a recognized value for display option open-to-spread on platform *" at Book (MZItmspBookPackage)

(Needless to say the file passes epubcheck verification.) I assume this is referring to the 'apple display options' file that is added to the META-INF file. And I assume it is because I should have put the value for 'open to spread' as "false" instead of 'auto'.
, and perhaps because I added the 'use specified fonts' line at the top instead of underneath the 'fixed layout' line.

Perhaps someone knows of another reason why the error message came.
before I submit the file again, I would like to try to make sure this will not happen again, perhaps someone has the time to check what I have below and let me know if there are any errors.
Greatly appreciated.

"Apple Display Options File"

<?xml version="1.0" encoding="UTF-8"?>
<display_options>
<!--platform name:"iphone" "ipad" "*"(all)-->
<platform name="*">

<option name="fixed-layout">true</option>
<option name="specified fonts">true</option>
<option name="open-to-spread">false</option>
<option name="interactive">false</option> </platform>
<platform name="iphone">
<option name="orientation-lock">portrait-only</option>
</platform>
</display_options>

The Content.opf file.

?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="book-id" version="3.0" prefix="rendition: http://www.idpf.org/vocab/rendition/# ibooks: http://vocabulary.itunes.apple.com/rdf/ibooks/vocabulary-extensions-1.0/">

<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlnspf="http://www.idpf.org/2007/opf">

( Various meta data including title, author, description copyright etc…)

<meta property="dcterms:modified">2014-04-15T00:00:00Z</meta>

<!-- FIXED-LAYOUT METADATA -->
<meta property="rendition:layout">pre-paginated</meta>
<meta property="renditionrientation">auto</meta>
<meta property="rendition:spread">auto</meta>
<meta property="ibooks:iphone-orientation-lock">portrait-only</meta>
<meta property="ibooks:specified-fonts">true</meta>
<meta name="cover" content="cover-img"/>

</metadata>
<manifest>

[odedta]

I don't know what you were trying to do, if you tried to have a fixed layout epub that works in iBooks here are the steps to achieve that whilst maintaining validation using EpubCheck:
https://www.mobileread.com/forums/sho...78&postcount=4

If you're looking to embed fonts in iBooks use this:
https://www.mobileread.com/forums/sho...d.php?t=239520

[verydeepwater]

[QUOTE=odedta;2832706]I don't know what you were trying to do, if you tried to have a fixed layout epub that works in iBooks here are the steps to achieve that whilst maintaining validation using EpubCheck:..

Thanks, I think I actually have the settings in those links you gave.
I am wondering if Apple are now not allowing the inclusion of their display options file in the META-INF. The epub 3 fixed layout sample produced by Apple, does not in fact work in iBooks 2. I found that by including the display options file, an epub 3 FL does work in iBooks 2, but I received the error message from Apple, even after correcting the points I mention above.