Anyone notice that Woody’s arm in the Toy Story 3 posters don’t have the lump Woody had in the end of Toy Story 2?[/i][/b]
I think it might just be the angle. If you look closely when Woody says “we’re busting out of here” in the trailer, you can see it.
Yeah, I noticed that also. I guess it depends on the angle because sometimes it seems like there is no lump, but other times you see it. (?)
One thing is for certain though… if you pay attention to his arm, you can still see the stitching where Andy fixed it. I like to think that maybe as Andy got older, he got better at sewing so maybe he took out some of the stuffing out and restitched it.
He still has the lump, how do you guys not see it? 
It’s in the trailer, and on all the posters.
Well, I didn’t see it because I didn’t pause the trailer.
So, mystery solved? 
yes.
not exactly. Look at when Woody is on the dresser and when the toys are talking in the room. Woody’s arm is completely normal, no lump. I’ll post a pic later
Here are some pictures…the lump is very small, and on his right arm, not his left. On some pictures, it’s harder to see than in others, due to the angle, but it is still there:
At times I say it’s barely there and at other times I say it’s gone.
Another question would be what happened to the ‘burn scar’ on his forehead that he got from Sid’s magnifying glass in the first movie? 
Hmm, that’s an interesting one, thedriveintheatre! But then again, it does disappear in the second movie, doesn’t it? It’s been a while so I can’t quite remember. Maybe Woody polished it off or something? Or maybe Geri cleaned it off when he was improving Woody in Toy Story 2?
Woody’s magnifying glass burn disappeared by the end of Toy Story.
This has to do with the general policy of Disney movies - the effects of physical violence on characters usually tend to disappear by the end of the movie, so they’re not shown to be permanent. The reasoning is that onscreen violence is apparently less traumatic if the evidence for it disappears.
For instance, Dory’s jellyfish scars also disappeared by the end of Finding Nemo.