Refreshing bug//flashing screen

I log into the game, Multiplayer and singleplayer, And the game refreshes

When i am randomply playing the screen will flicker white, not responding for about half a second or less and apparently close and reopen on the task bar
I ma having the same problem as: http://www.planetminecraft.com/forums/minecraft-refreshing-bug-t277002.html

Hope this gets resolved soon