When Veronica is talking to Brad in the Hospital (after her Bee incident), there's a scene of her character lowering her hand and almost smiling.. which is used again almost right after the first one.
When Lucy/Trident is hacking into a system, all the code displayed is HTML, not any programming language. There would have been nothing to hack with HTML, as it is a semantic markup protocol, not a programming language.
As Veronica and Brad leave the Pumpkin Soup Restaurant and get into a Hotel, Veronica jumps on the bed, where her nipple is revealed. Actor Paul O'Brien can then be seen covering her as he notices. Luckily, the scene was still used on the final release.