For what it's worth, I had the same problem in Nautilus 3.2.1, using my home folder as the desktop with a modified user-dirs.dirs . The issue is present on both my computers (one with Oneiric, the other running Mint 12, but it's the same package AFAIK) and it happens with the user-dirs.dirs modification as well as with the dconf setting. For both computers, switching back to the default ~/Desktop directory makes the leak go away.
For now I was able to fix the problem by downgrading to Nautilus 3.2.0 (package 1:3.2.0-0ubuntu5).
If I can provide any other info to help you resolve this bug, please tell me.
For what it's worth, I had the same problem in Nautilus 3.2.1, using my home folder as the desktop with a modified user-dirs.dirs . The issue is present on both my computers (one with Oneiric, the other running Mint 12, but it's the same package AFAIK) and it happens with the user-dirs.dirs modification as well as with the dconf setting. For both computers, switching back to the default ~/Desktop directory makes the leak go away.
For now I was able to fix the problem by downgrading to Nautilus 3.2.0 (package 1:3.2.0-0ubuntu5).
If I can provide any other info to help you resolve this bug, please tell me.