Menubar transparency corrupted on multiple screen configurations

Number:rdar://18352946 Date Originated:9/16/2014
Status:Duplicate/18374686 Resolved:
Product:OS X SDK Product Version:Xcode 6.1 Beta 2 (6A1030) / OS X 10.10 (14A361c)
Classification:UI/Usability Reproducible:Always
The menubar displays random junk instead of transparency on the right edge of an inactive screen when multiple monitors are configured.

Steps to Reproduce:
1. Configure multiple monitors.
2. Look at the right edge of the menubar of the inactive screen.

Expected Results:
The transparency for the menubar should take into account the background of the screen.

Actual Results:
There's random junk displayed. See the attached Menubar_Photo.jpg — the white gradient that's shown is not a part of the background image (which is a solid blue.)

Xcode 6.1 Beta 2 (6A1030) / OS X 10.10 (14A361c)

You can't take a screenshot of this state. As soon as you try to, you get the correct pixels. The attached Menubar_Screenshot.png file contains an image created using CGWindowListCreateImage().

There are two 30" screens (each is 2560x1600) in my configuration. The graphics cards are NVIDIA GeForce GT 120. A system report is attached (Mac Pro.spx)


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