Player platform:

Windows, 64 bits version 0.8.0 of the Player.

Describe the issue in detail and how to reproduce it:

When setting a picture to be displayed as flipped with the Show Picture command while being a spritesheet, the whole spritesheet is flipped instead of just flipping the selected sprite.
When trying to flip this sprite from the spritesheet horizontally and vertically...

The sprite will be displayed like that in the Maniac Patch:

And like that in the Player:

Thank you Gaburinbro for reporting this issue!