Duplicating actions & events is a great way to save time when you can use "back" and "next" (bottom right of the window), to quickly change the object you want to apply it to however it doesn't work when you do it with behaviours even if the new object you're trying to apply it to has the same behaviour.
<img src="https://dl.dropbox.com/u/1024727/c2/back1.PNG" border="0" />
1. Making a copy
<img src="https://dl.dropbox.com/u/1024727/c2/back2.PNG" border="0" />
2. Here I've gone to edit action, then clicked back and selected a new object then gone next again but it hasn't highlighted the action I want (chose the first on the list instead).
<img src="https://dl.dropbox.com/u/1024727/c2/back3.PNG" border="0" />
3. Wrong action! Since I gather back/next feature was to save time, you usually do this quickly and sometimes forget to highlight the correction action for behaviour related ones.
<img src="https://dl.dropbox.com/u/1024727/c2/back4.PNG" border="0" />
4. What it should look like.
I also have a small feature request that would speed up eventing A LOT!
<img src="https://dl.dropbox.com/u/1024727/c2/back5.PNG" border="0" />
Instead of using back/next we could just double click on the object area to quickly open a window with the objects, so you can assign the action to a different object instead of going back and forth!