I've just noticed that my builds using the API 3.1 all have a subtle letter 'C' visible in the lower right-hand corner of the screen. It doesn't seem to have been there with API 2.4 and API 2.5 builds.
I have myself some layers with no attributions but I still get the grey copyright box visible (but empty). I don't want to disable the whole copyright thing. How can I hide the box when no attribution are setup for the layers ?
The attribution code is built into the API and you do not have access to change it so the only thing you can do is check your active/visible layers and if they do not have a copyright (i.e. an empty string) then turn off the maps attribution.