I like the idea of playing with the colors, and especially have a book's TOC marked off.
1) When I opened A14, my first response was "Whoa, too much gray!" in the tabs and title bar. I liked (or at least was used to) what was their before. At least, it's too dark.
2) The TOC shading is too blue-ish. I'd prefer a lighter shade of gray, something that is just barely noticeable, but sets it off as "not-reading-material-like-that-other-pane-over-there"
Thanks