I have an 06 and also have some bubbling of the paint on the rear tailgate - more or less below the rear wipers assembly.
Great post guys - wish I had seen this before buying my Expy, would have had a better idea what I was looking for. Fortunately, I lucked out in most of those scenarios except the rear bubbling of the paint and my $1,500 tune-up @ 74,000 miles. 6 of the 8 spark plugs were seized inside the engine and my friend spent a week and a half doing everything he could to take out the spark plugs without tearing the engine apart and pulling out the heads. A week and a half later with 2 broken specialty tools, lots of patience, and ingenuity he was able to get them out and complete the tune up.
I've read some stories of folks taking it to the dealer and having to pay something like $3,000+ to replace spark plugs because apparently FORD will just simply pull out the heads if a single spark plug seizes inside...