I have a work around IF you want to risk your save in the meantime. All you have to do is edit the version value:
Yesterday everything was working fine with my downloaded worlds as I test a texture pack that I was working on.
Version of the downloaded world: 1.8.0.24
I uploaded the world to my realm with no issue. I went home and downloaded the world onto my laptop and I'm getting the "A newer version of the game has saved this level" message.
Version of the new downloaded world: 1.8.1.2
Now I can change the updated version number to the previous one but this is a horrible workaround.
Understandable, I was just merely providing a workaround until the issue has been resolved. It's helped me at least for the time being.