This is old and hopefully it's been resolved by now, but for anyone who's curious, it appears the quotation marks for attributes in the .ncx file are angle quotes when they should be straight quotes.
For example:
Invalid quotation marks:
Code:
<navPoint playOrder=”1?>
<navLabel>
<text>1. Objective: Becoming a Millionaire</text>
</navLabel>
<content src=”StinkinThinking.html#start”/>
</navPoint>
Corrected quotation marks:
Code:
<navPoint playOrder="1">
<navLabel>
<text>1. Objective: Becoming a Millionaire</text>
</navLabel>
<content src="StinkinThinking.html#start"/>
</navPoint>