When Stephen slides the Roark notebook to Chuck, the label on the book's spine is upside down. When Chuck picks the book up, the spine's the right way up.
During the ending scene, the song 'Daddy's Gone' by Glasvegas is playing, and the line 'Be as fucking insincere as you can' can be heard in the background. The swearing is not blanked out or changed.
Around 11 minutes in, Chuck looks at an ad for NetExpo'09 from Roark Instruments. The website in the bottom right says www.roarkinst.con/techexpo - not ".com"