Hmmm...I'm not so sure about this. I also lack the "/usr/share/cinnamon-background-properties" folder, bit it does not appear either on my 201303 LMDE fresh off the ISO, nor after upgrading to Cinnamon 1.8.8.
I am also experiencing some problems with wallpapers on both my established desktop and a freshly installed laptop, but both problems are different i.e. in the former case, my right-click-on-desktop option for 'Change Desktop Background' suddenly doesn't work, whereas in the latter case there were absolutely no wallpapers to chose from by default.
There is nothing more dangerous than a bored cat.