When Stan is getting his shirt torn his right sleeve is not torn but when they show him from the front his sleeve is now torn.
When Stan is being lead through the hidden PETA campground, there is a background character who's shirt has PETA written backwards.
When Sean Combs comes to Stan's door, Stan refers to him as "Puff Daddy." Combs changed his "stage name" to P. Diddy circa 2001, so by this point in time the Puff Daddy name was already out of date.