Originally Posted by Ankh
ADE on Sony is really sensitive to the size of the "chunk", which is the reason that I always-always-always hand-edit the results of the conversion to have a single file per TOC entry. The smallest possible size of the xhtml chunk really helps.
What my first post is getting at is the HREF tag cause the SONY/ADE support to really get bad, more so than a single TOC entry for an HTML tag.
Try the attached fix on a calibre generated ePUB and you will see the difference.