When Wilson and Elaine return to her apartment after she finishes work on the film set, in the first two shots of them driving into the garage, Wilson's car has no damage on the side from the previous car chase sequence. However, in the rest of the scene, where the car is parked, the damage on the side of the car is there again.
The Pleiades is a star cluster in the constellation Taurus; it is not a constellation itself.
One shot shows Wilson and Ed standing by Terry Valentine's pool overlooking the nearby Pacific Ocean. A few minutes later as they are leaving the party Wilson and Ed drive past the intersection of Ledgewood Dr. and Mulholland Hwy. which is actually about 25 miles from the ocean.