The MacRumors and Adobe support forums are firing up with users reporting severe flickering when using some 2013 13-inch MacBook Air models in Photoshop, especially when larger brush tools are used.
Chris Cox, an Adobe representative, posted on the Adobe support forums, saying he believes it's a driver or GPU issue, going as far as stating that it could be a problem with the LCD driver circuits. He has said that Adobe haven't reproduced the issue, so it could just be a particular run of MBA models that are having these issues.
When we file a bug with Apple that we cannot reproduce ourselves: Apple ignores it.
Apple needs to hear from customers who experience the problem, and needs details on exactly which systems have the problem.
We will continue to research this, and if we find a system that reproduces it, then we can file a bug with Apple and have some hope that they might investigate.
Also, thanks for the video - that is definitely a driver or GPU issue, though with that kind of flickering I'd also suspect the LCD driver circuits.