Binary package hint: nautilus
When I choose "Safely remove drive" context menu entry for an external USB drive within a nautilus window or directly clicking on the desktop icon, after about 10 seconds the drive is automatically remounted and a Nautilus window showing the root folder opens.
I have noticed that similar already happened with a very old Ubuntu version - Bug #110589 and as that is so long time ago I thought it is better to open a new bug. Reason of the problem might even be completely different.
DistroRelease: Ubuntu 11.04
Package: nautilus 1:22.214.171.124-0ubuntu13
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 126.96.36.199
Uname: Linux 2.6.38-8-generic-pae i686
Date: Thu Jun 2 23:40:08 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
UpgradeStatus: No upgrade log present (probably fresh install)