CD stays mounted when ejected and another CD inserted

Binary package hint: nautilus

This happens on two PCs I tried: a HP nw8440 laptop and a Toshiba L500-13T laptop

I booted the live environment from an USB stick using the ubuntu-10.10-desktop-i386.iso

I inserted a CD into the built in optical unit.
It is mounted and an icon appears on the desktop.

 - I open it by double-click : the contents are displayed in a window
 - in terminal I check with "df" that is is mounted
 - I press the eject button on the unit: the CD is ejected

Problems:
OS does not notice the CD is ejected. The content windows is still there, also the icon on desktop. "df" also shows it as still mounted. ("mount" also).

 - I insert a different CD
 - In the CD content window (still showing content of the first CD) I open a folder:
the folder content from the first CD is displayed (probably cached)

 - I open a text file in that folder: the text editor opens and complains it can't read the file due to I/O error

syslog has a few lines of : ISOFS: unable to read i-node block

ls also show the old file contents.

If I right click the CD icon on desktop, it is refreshed:
 - the label changes to the label of the second CD
 - it is remounted (the content of the second CD is now readable), but under /media/label_of_first_CD , not its own label

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: nautilus 1:2.32.0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
Date: Wed Oct 13 09:05:31 2010
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus