In Safari 4 it was possible to copy nested content without copying the whole "tree" so to speak. Using Safari 5, it seems that the whole tree is copied.

For example, you have the following macros nested within each other:

{section}
    {panel}
        {cheese}
    {panel}
{section}

In Safari 4 you could click on the {cheese} macro, copy it and then paste it elsewhere on the page. Now when you do the same action, it will paste all three macro's rather than just the one you selected.