Installed from 14.0 livecd, fully updated. I go to 'Cinnamon Settings' -> Themes, select one, and nothing happens. It seems to highlighted when I check back, even after logging out and back in again, but it's not being applied.
I *can* change the wallpaper, but that's about it.
What I'm really trying to change is what KDE distros would call "window decorations" -- I don't like the grey itunes-esque look, but there doesn't seem to be anything specific for that element. If I were using a KDE distro (or maybe even the KDE version of Mint) I'd know where to look, but I'm trying to give Cinnamon a fair chance.