Open Radar

 
Summary:
I have various stretchable, 9-part images in my app that are no longer displaying correctly when I build for iOS 9 (or OS X 10.11). The same image assets displayed correctly in iOS 8 (and OS X 10.10). Depending on the image, it may show certain slices as being lighter or darker than they should be. I have attached a sample app demonstrating this as well as two screenshots:

iOS 8: The button displays perfectly, even when pressed.
iOS 9: When the app targets iOS 9, the bug is especially apparent when the button is pressed, though it's present even when it is not pressed.

Steps to Reproduce:
1. Run the sample app on iOS 9.
2. Examine the button's background image.
3. Hold down the button and examine the background image.

Expected Results:
The image should be a rounded rectangle with a light grey, even colored background. The rectangle should have a hairline (1pt), darker grey stroke around it.

Actual Results:
Neither the background nor the stroke is an even color—various sections are lighter or darker than they should be.

Version:
iOS 9 beta 3 (13A4293g) and Xcode 7 beta 3 (7A152u)

Notes:
This bug was also present in iOS 9 beta 2, and I believe it was in the first beta too—though I'm not 100% positive. As noted in the description, a very similar problem is also present in the OS X 10.11 betas—see rdar://21735415

It's also worth noting that if I set the deployment target to iOS 8 then the problem goes away, even in iOS 9.

Configuration:
iPhone 5, AT&T, 64GB

Attachments:
'SlicedImagesiOS.zip' was successfully uploaded.