There game window looks like minimalized in fullscreen, but all thing stay where they always are. For example: I can click an invisible Quit button and I don't see, which hotbar slot I have choosed.
I just wanted to play a next snapshot as normally.
I launched Minecraft and there all was normal as always (excluding broken world panorama, but it's other bug). When I joined a server, I saw a broken window. It's very similar to the fullscreen bug in Old Classic. This void's color is relative to the time of day. While holding items in inventory, there appear a trail in item's shape, only on the void's area. I have a laggy computer, so this trails are better visible. Icons of tabs do it too. When I go back to the Main Menu, then it's affected with this. Additionally I don't see my hand and what am I holding now. Probably I don't see 65% of the window. Fortunately Options... are always visible as a whole.
Steps to Reproduce:
1. Launch Minecraft 1.8.2-pre5/pre6 (the same bug appears on both versions).
2. Open a world (server, or singleplayer world).
3. If you go back, the Main Menu will be broken, but you can still click invisible buttons.
This time I play 1.8.1, because it's good.