Am I crazy, or do Alt-Bkspace and Ctrl-Bkspace no longer fill with fore/background colors?
I use this a lot! Every time I try, my computer beeps (error).
On my system Ctrl- Backspace does work, Alt-Backspace does not. The bug is known by Adobe. Hit the Alt-key a second time and hold. Then press Backspace.
However using the Del key instead of Backspace does work.
Win 7 Pro.
This is resolved in Photoshop 19.0.1 which was just released.
If you don't see the Photoshop update in your Creative Cloud application, then click in flyout in upper right corner and choose "Check for App Updates".