Comment 1 for bug 1055478

+10

I propose a more refined configuration option though
- Raise the most recently focused window (default)
- Raise all app windows for a user configurable list op applications.

When I develop in Chromium or Opera, with the browser on 1 screen and the debugger on the other, default behaviour really sucks. They are not separate instances but really belong together. I NEED to see BOTH with ALT TAB.
Same for Gimp in multi windows interface.
That's fundamentally different from LibreOffice with several documents for which default behaviour is fine.

I consider this as the biggest drawback of Unity, together with this:
Alt tab gives wrong amount open windows on multi monitor workspace
https://bugs.launchpad.net/unity/+bug/1010436

But last one one will practically be solved with above suggestion.