Downloadable Products being charged shipping?

We have run into a high priority issue on our store.

There are several products we are offering that are digital downloads, which should NOT be charged a shipping cost. However, we've had some orders come through, and those downloadable products are being charged for shipping regardless of the fact its a downloadable item.

I cannot find any setting or easy way to disable this on a per-product basis, Nor can I find a setting store-wide to fix this either.

I would greatly appreciate expedient assistance with this issue.

Thanks all!