I've been trying to upgrade my Surface RT with 8.1 Preview to the general release of 8.1 all day, and have been unable. All my other PCs (laptops, Surface Pro tablet, Desktop) upgraded from Windows 8.0 to 8.1 just fine.
What happens is that the 8.1 preview tile in the store is just missing. It's blank. There's nothing to click on. I've tried a variety of ways of getting to it, but nothing seems to work.
Anyone else experiencing this problem?