I'm using Ubuntu 12.10 and I want to give Cinnamon a try, so I installed it from the stable PPA listed on http://cinnamon.linuxmint.com :
It works in Unity, but when I log in with Cinnamon everything is huge and the interface pans as I move the mouse. It looks like the display is actually set at a very low resolution, but the desktop is the correct size.
It's a laptop with an nVidia chipset.
The native resolution is 1600x900. I can't tell what actual resolution is being used because xrandr even reports it as 1600x900.
I've tried both the proprietary driver and the nouveau driver.
I've tried removing the xorg.conf and rebooting without it. I've also tried re-generating it with nvidia-settings and rebooting.