Lion won't copy files to multiple external hard drives at the same time

Hi there,
I upgraded my OS to Lion receently and I've noticed a bit of odd 'bug'
I want to copy the same files/directories from my Mac to my 2 external USB hard drives, but I find that Lion only lets me copy the files one hard drive at a time and not simultaniously, whereas Leopard/ Snow Leopard would let copy the files over simultaniously.
Has anyone else noticed this and is there a fix? I'm a photographer so I need 2 backups of the photographs I take and it's really annyoing that I can't transfer files simultaniously.
I always use Lacie hard drives and I've also noticed the same thing with my WD hard drives. All of my externals have been indexed and at Mac formatted.
Any help would be apprecated.

By the way- I did create an Automator workflow to copy files to drives, and then I just use two copies of that workflow, and everything works fine. But I should just be able to drag and drop, this is not an elegant solution to a simple finder issue ...
Download the workflow here: http://www.ryanewalters.com/downloads/DualCopy.zip

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