Comment 3 for bug 741121

@TheGhost: It appears that you are running Ubuntu 10.10 (aka Maverick Meerkat). I committed some fixes for this to the upcoming 11.04 (aka Natty Narwhal) release and this feature should be working there. If you dare run the development series of Ubuntu I suggest you try out the latest development release (or the very-soon-to-hit-the-mirrors beta release).

Otherwise I'm afraid you have to wait it out for the stable release of 11.04, as this bug fix is unlikely to be backported to 10.10. Sorry for the inconvenience.