Well that was fast - I got a reply back from Forest River this morning.
They said they've never heard of that and asked for pictures so they can take a look and see what can be done.
I'm trying to get some decent pictures of this. Here are a couple where I zoomed in on the areas that are most pronounced and I was able to capture with a camera.
Here you can see where the side appears to have been pushed in and the forward side of the outdoor shower enclosure has almost separated from the trailer:
Here's another angle look forward of the trailer at a slight upward angle. Notice the distinctly wavy areas where it looks like it was hit:
The other three sides of the trailer are completely and perfectly flat. It's hard for me to accept their explanation that this can happen with the trailer just sitting there because of poor construction. It wasn't like that when I bought it and it wasn't like that when I dropped it off with them less than three weeks later.