if you go into f11 mode and then exit it would not let you go to full screen anymore. as well as that every time you log into Minecraft it would automatically put you in f11 mode meaning that you NEVER would be able to go back into normal non-f11 fullscreen (switching versions, reloging and restarting the computer do not solve the problem)
We are unable to diagnose your issue due to the lack of proper debug information. Please review the guidelines before reporting issues.
In case of a game crash, please also attach the crash log from
[minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder/]
.-- I am a bot. This action was performed automagically!