At first I save my game in 1024x768 and than change into 800X600. When I load the saved file the engine is still in 800X600 but screen_size.x is the number 1024 and screen_size.x is the number 768.
I made a screenshot and it`s in 800X600 too. All the positions of my panels are set by screen_size and are wrong because screen_size.x is 1024 and screen_size.y is 768. The engine is in 800x600.
I used a panel to show screen_size.x on the screen and it said 1024.