I have been having a problem with all my epubs downloaded via the Fetch News function.
At the bottom of my T2 there is this massive wasted space with a TOC button:
For what it is worth: I am running Calibre 0.9.6 (this behaviour isn't new or particular to this version though), and Sony T2 is running firmware 1003 09 110 (which is the latest).
Sometimes the epub renders perfectly (e.g.: without the TOC botton at the bottom), but I can't reproduce the error. The only consistent behaviour I can seem to find is that when I download the epub via the content server, it never displays correctly, versus when I plug it in via USB, it sometimes displays correctly.