When Steve shows up at Sterling and Darius' apartment, Sterling is wearing walking shoes whereas in the scenes immediately before and after, he is wearing black slip-ons.
Steve's arm tattoo disappears.
In the cloakroom scene at the memorial, the door to the room is left ajar when the characters enter the room, but in some of the cuts you can see that it is closed. Many of the cuts showing the door both ajar and closed are immediately back to back making the change very obvious.
During the church scene, you can see Nathan Lane breaking character briefly and laughing at Steven Weber's reaction after he (Lane, as a clergyman) grabs Jeffrey's ass the second time.