What I did when I wanted extra timing was to add silence of 2 seconds and include it in my first Labeled word. And if I wanted extra time at the end, I had extra silence at the end of the audio recording and then included it with the last word on my .smil file.
You might try that and see if you get a more consistent result.
I have CSS animation in my Children's Book and only words on my first .xhtml page of a two page spread. The animation happened on the second .xhtml page so I added enough seconds to the first page .smil file to have it keep going until the animation played out on the second page. It worked very well. And the page will not automatically flip until the .smil file tells it to be done.
Tim, after re-reading what you wrote about spacer timing, we might be saying the same thing. I have an Original iPad I'm testing mine on but I'm pretty sure I have the new iBooks 3 on it.
I do know when I was originally testing the read aloud for my eBook, it would skip a word. Usually when I closed and reopened the book on my iPad, it would resolve itself. Other than what I mentioned, I have no other recommendations.
Message was edited by: JudithT
Message was edited by: JudithT