User blog comment:N7/Battlefield 3 Beta is an older build of the game + Changes from Beta to Final game/@comment-3238415-20111004213842/@comment-28584497-20111007023157

Code doesn't work like that, ghillie. Unless there's some deeper mistake (or the programmers are completely inept), one which affects a wide range of portions of the game, then no, it isn't possible. Knowing DICE's old engine so intimately as I do, and having knowledge of computer programming in general (including actionscript and C++), I can attest to the fact that slight changes and fixes are just that, and do nothing more. So unless they screwed up the syntax (which is unlikely, given that most syntax mistakes create fatal errors), changed more than what they said they did, or were otherwise lying/inept, there's no way more issues were added.