When I use the Book Lite theme on my blog, the text/bullets in the header's navigation area are all evenly spaced (about 5mm between the bullets and the text on either side) except the farthest one to the right. The last piece of text on the right sits just over 6mm to the right of the last bullet, leaving that bullet off-center between the text on either side of it. This might sound like a minimal difference, but the theme is so clean it's very noticeable.
The blog I've been trying it on is http://grayherndon.wordpress.com, but I find the same to be true at http://booklitedemo.wordpress.com/ and at the blogs WordPress provides as examples of the theme here: http://theme.wordpress.com/themes/book-lite/ .
I've shown the same links to a couple of people: one saw the same thing I did, the other didn't (and indeed, in the smaller image of WordPress's demo page shown at that last link, the spacing appears fine). So I don't know if this is actually a problem with WordPress/Book Lite, but it doesn't seem to be just my computer, either.
The blog I need help with is grayherndon.wordpress.com.