Check your edging/trim in the bathroom, much of ours is falling off as they fired the nails too far through them so they were barely holding on.
Also the patterned piece that is over the windows, these are stapled from the backside of the box into the patterned piece. In this case they didn't staple well enough and had these falling off as well. Just finished fixing one of these, pulling out all the old crappy staples was not a fun task. Here's some pictures: decorative window trim fell off - Album on Imgur
Pull on like everything lightly to see what might be barely holding on as once you're bouncing down the road it will come off.
Also have them fill up your grey/black tanks with water and flush them out - had a large chunk of plastic cut-off from one of the tanks come out the 2nd or 3rd time we dumped and get stuck in the hose.