Nautilus option for preventing automount is gone. gconf-editor setting /apps/nautilus/preferences/media_automount_open is set to no but media is automounted anyway. Only way to prevent auto-opening of nautilus is Systemsettings->Media->never ask or start programms when media is inserted->yes but this affects every media: CD, DVD and so on. And also in this case: Media is mounted automatically.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: nautilus 1:3.2.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Tue Oct 25 13:36:09 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to oneiric on 2011-10-01 (23 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.