I downloaded it recently and have played a few missions with good success but it never wants to upload the data, always says, "Data transfer was unsuccessful. Please try again later."
I have no idea how to try again later, I don't see an upload button or anything.
I created an exception in Windows Firewall, and have even minimized and launched my browser to verify that I have Internet access before clicking OK on the mission results and it still doesn't upload the data.
I'm sure I'd be at the top of the leaderboard if only I could get my data to upload.
Rick