Yes, with 2013, some squares of the BiaB logo are missing.

BiaB application startup has been an issue for a long time.

It used to be reeeal slow but was "fixed" about two versions or so ago.

Graphics drawing of the BiaB screen in general (the chord entry sheet) is something I reported on several times, also a long time ago. And it is much better now. Though it still does slightly funky things every once in a while.