I haven't cleaned one surface at a time to work out where the big blotches come from but if it was a shot from a wideangle lens with raindrops on the front element I'd expect them to show in a similar way. It was a shot from the MP-E 65mm set at 5:1 and smallest aperture.
I also seem to have a bit dust* within the lens of my compact which shows smaller and sharper at the wide end than it does at the long end of the optical zoom.
* the dust looks like a bit thread from clothing FWIW