In short, a lot.
FlatPage, our page-curve correction feature in PerfeCapture basically underwent a major overhaul since being launched in Oct 2013. Now, it no longer requires the book gutter to be aligned to a center line – gutter position and book skews are automatically detected and you can place books (of page size A5 and smaller) anywhere on the xcanpad so long as the camera is able to see the whole book. We figured that it would be a big plus to let users flip pages without having to worry about repeatedly aligning the gutter. Curve correction is now more precise for texts printed near the gutter.