So far, yeah, I'm only having trouble with Dragon Valley. I've tried the troubleshooting process and it just stops working right in the middle of it. I can't even get to Step 3.
I'm in the US, trying to download it from thesims3.com. I bought it and went into my Purchase History and clicked download. It'll say that it's downloading into The Sims 3 Launcher, but then the download into the launcher, not even installing into the game itself, has just cut out and it won't finish. I've tried multiple times, daily since I bought it three days ago, and it still doesn't work.