Comment 3 for bug 907311

This is very serious, as for most users it would mean CD burning is entirely impossible.

It seems to be associated with either...
* having run Brasero to burn a CD with the windowed client within the same session
* allowing automount behaviour to trigger Brasero with the Nautilus-embedded client

I suspect it's to do with the automount behaviour, which is presumably an 'instance' of Brasero which someone thinks is more easy to use than the client itself (by dragging and dropping files). This doesn't cut it for burning ISOs though.