Originally Posted by DSpider
If the links in some ePub files work, but in your ePub files they don't, I suggest you open up both files and have a look at their underline code.
This is probably the reason why they don't work:
It's called PEBKAC.
Whatever it is I don't think it explains why the links work on my Sony and iPad/iBooks, and on my Kindle Keyboard after conversion.