When Linda and Walter are riding on the bus, she spots someone on a side street. They start yelling for the bus driver to stop, which he eventually does. But when we see them stepping off the bus, it's right at the corner of the street where the person is. They would have had to walk back at least a block.
Linda offers Walter a Marlboro Red cigarette outside the courthouse. He declines. She then pulls a cigarette out of the pack and lights it. The cigarette, and filter, are completely white. Marlboro regulars are white with a brown filter.
There are several references to Pittsburgh throughout the movie. The sign in the restaurant window lists a phone number that begins with a Philadelphia area code.