cd ejection

[Norman Silverstone]

There are 2 users on my machine my wife and myself. My wife had been
using the computer earlier today and when she had finished I decided,
for the first time, to change to my desktop using Applications-> System
Tools-> New login. Some time later I came to eject a CD from the drive
and could not do so although only about half an hour before I had been
able to. The error message told me that only my wife could eject the CD.
Therefore, I changed desktops, this time using System-> Log Out and then
ejected the CD. I am using Hoary and this has never happened to me
before. Could someone please explain to me what is going on and why this
should happen?

Norman