I noticed a line on the left edge in login screen on my Macbook Pro, first I thought that it was a screen problem, but then I realized that I have same line on Macbook Air and iMac too. And I can take a screenshot of the line. It appears only in login screen, on left edge of the screen. After I login screen looks perfect. It looks like dark shadow that covers wallpapers is drawing wrong. Does anyone experience same issue?