While in court arguing the Restraining Order, the clock on the wall has stopped by evidence that the second hand isn't moving. This is a trick by directors who don't want to see time advance too much during multiple takes.
The AT&T building visible from the parking structure when Mike meets his new employer has the current, lower-case "at&t" logo which was not used until after the merger of SBC, Cingular and AT&T in 2005.