Kenny's watch disappears when on the sidewalk outside the Albuquerque Sunport, just before the Millers get the RV. It appears in all previous and subsequent scenes.
When David is talking on his iPhone in the garage, his iPhone is clearly locked the whole time. The lock screen is visible when he hands his phone over to Pablo.
When Dave is making his rounds, dealing to his usual customers, his first stop is a woman with a baby. As she counts out what he's due the baby barfs up copious amounts of orange goo on his grey hoodie. At all subsequent stops his hoodie is perfectly clean with no sign of ever having been barfed on.
What are the differences between the Theatrical Version and the Extended Cut?
A
In the US, both the DVD and Blu-ray release contain the Theatrical Version as well as an Extended Cut. Since Warner Bros. don't release Unrated Versions anymore, the Extended Cut got an R by the MPAA as well. Contentwise, the 8 additional minutes offer more sleazyness so the missing "Unrated" term shouldn't be overrated. Around 30 differences can be found and a detailed comparison between both versions with pictures is available here.