When I lived closer to Providence, I had seen several local/regional reports and/or video footage that were both on 7 and 10--sometimes, originally from 7; sometimes, originally from 10.
And, though not nearly as often, I've also seen sharing between 4 and 12. (I seem to recall that 4 started airing its morining news on 28 at some point--do they still? If so, I'd imagine that any sharing between 4 and 12 is pretty much done.)