Comment 6 for bug 278625

Also, I just merged iscsitarget_0.4.16+svn162-2ubuntu1 for Jaunty.

But package upgrades will fail until we get the module unloading working properly.

As a workaround in the meantime in Jaunty, you can:
 $ sudo service iscsitarget stop
 $ sudo mv /etc/init.d/iscitarget /tmp
 $ sudo apt-get update
 $ sudo apt-get upgrade iscsitarget
 (Accept the package maintainer's new init script)

:-Dustin