I haven't seen this reported anywhere else. I am running the latest WordPress version 3.5.1 and the latest Leaflet Maps Marker plugin version 3.5.2. Everything was working fine until I started using W3 Total Cache along with MaxCDN. Now, my map markers (except the default one) do not show up on the maps.
Please see ayso13.org/maps/ for an example.
Investigating further, I see that there is a problem with the path for the map markers.
"NetworkError: 404 Not Found - http://cdn.ayso13.org/wp/wp-content/uploads/leaflet-maps-marker-iconscommunitycentre.png"
Notice that the forward slash between the maps marker directory and the name of the marker file is missing. This does not happen with the default icon. Also, I have no issue with delivering other media files from the can.
Is this a bug or have I missed a setting somewhere?