This happened two days ago and the raw pictures are now trickling in at
the Cassini site.
In celestia it looks like this:
Edit: On closer inspection on the order of the raw images, it seems more like Cassini has just missed it.
Whatever. It will probably happen at least a fwe more times during the next years.
However, around the same time, Cassini did get some nice shots of Rhea, Dione, Mimas and the rings in the same frame. I made a rough color composite (moon positions taken from the blue-filter image; Mimas was out of frame for the red, so I duplicated the green-channel data).