Unfortunately it seems that the v2 firmware borks the line spacing, at least for the non-DRM'ed Epubs that I've tried.
Here's a photo of my T1 on the left (with DecalGirl black skin) and my wife's on the right, running the old version. Same book, approximately same page.
Notice how loose the lines have become on the left-hand one.
Can I have my 1.1.11230 back?