I have downloaded a few houses that have Macarossi's "Garden in October" and "Pond in July" objects, some from here and some from MTS. I have never been able to get them to show up correctly(I have a few lots that have so many apple sculptures on them it's not funny). I considered that maybe(even though it said it was included) that the mesh was missing, so I went and downloaded the sets directly from Macarossi's page. Still no joy.
Here is a picture of the Bluewater lot I downloaded from here.

I was wondering if there were any known objects that conflicted with this. I saw on the "Pond in July" page that there was initially a problem with a GUID conflict with the Hippo fountain, but that was resolved long before I ever downloaded the set.
It's kind of sad because the sets are beautiful not to mention the houses.
I have all the EPs and SPs.
Side note: I also have the same problem with wallpapers not showing up.