Photoshop script that prevent Photoshop jumping layers

Just wanted to share a neat little script I found for Photoshop. It prevents Photoshop from jumping layers when undoing and it has all ready saved me tons of frustrations of painting on the wrong layer. Thanks to Sinistergfx for saving me a lot of headaches:

The forum where I found it:

http://www.polycount.com/forum/showthread.php?p=1251347#post1251347

And the script:
http://dl.dropbox.com/u/3580711/StepBackwardSmart.jsx

Add the script to the Photoshop script folder and assign a hotkey to it.
Edit - Keyboard Shortcuts - Application Menus - File - Scripts