We are aware that Minecraft version 1.8 (also known as the "Adventure Update") has been accessible via semi-official channels since the end of last week following a Mojang developer released the update with the approval of the studio. If you're not feeling like going through the file, however you can download the update via the Minecraft launcher, where it recently went live for all users.
This isn't something we believed would be of any concern to our more tech-savvy users who hunt for files. However, if you are worried about downloading an update for your game that could secretly be a bestiality virus You can download the update now without any concerns.
[Thanks, Richard.]