I'm trying to get VueScan working with my CanoScan 8000F. The final step is to start VueScan using Rosetta.
When Vuescan.app is placed on the Desktop, everything works as it should.
Copying the same app to the Applications folder dims the Rosetta option.
Here'a screenshot showing the info screens of the two apps (on the Desktop and in Applications) side-by-side:
What can be causing this behaviour? Why is the Rosetta checkbox greyed out? I'm on a MacBook Pro 5,3 with Snow Leopard running from an external disk.