When the old couple who give Wolverine clothes are first driving towards their house, there is an aerial shot of them driving over a bridge. This is supposed to be set in Canada (drive on the right) but it was filmed in New Zealand (drive on the left). They are driving on the right but the arrow on the road is on the left side.
When Wolverine goes to the gym to talk to Fred, Fred gets insulted because he thinks Wolverine calls him a "blob" (Wolverine actually uses the word "bub", as he often does). In the comics Fred's character's name was the "Blob".