Before Shawn throws the ball of paper into the basket he wraps a colored piece of paper around the outside. However, when we see Shawn's ball go into the basket, it is the same shot of Gus's unwrapped ball going into the basket.
In his office Shawn picks the Jack of Hearts up off the floor. In a subsequent shot it's back on the floor but he never puts it down.
The client gives Shawn a single packet of money wrapped in a bank strap, and then Shawn refers to receiving $7500. However, bank straps do not come in that denomination.
"Psych" is said to be set in Santa Barbara; however when Shawn and Gus drop Brandon off at his father's dealership, there is a Cam Clark dealership in the background. Cam Clark dealerships are located in Canada, not in Santa Barbara.
When J.P. Berger (Berg) is taken away for cheating in the tournament they put a hold on the chips while it was being sorted out. In the next scene we are to assume that they decided that Shawn won since they gave him all the money. This is not what would have happened, because everyone that played against "Berg" was actually cheated out of their spot they would have had to do the tournament over.