There are two different tools here.  The "Dolly" tool -- pictured on the left -- behaves exactly the same in Carrara 6 as it did in Carrara 5 and all versions of Carrara before it.

The "Pan" tool -- pictured on the right -- behaves exactly backwards of how it did in earlier versions.  If you select the PAN tool and move your mouse to the right, the image pans to the left -- precisely the opposite of how it did before.

The right-button solution that our Teutonic friend above suggested, though, works as I expect the pan tool to work, as the pan tool has worked for years in Carrara.

And, yes, I'm using C6.03Pro.

• Dex