In that case rhythmbox should update the bubble correctly. Examples for doing this can be found in notify-osd trunk (lp:notify-osd) in ./notify-osd/examples/update-notifications.py. There's also an ANSI C example, but that's not up to date at the moment. This is solely an issue of rhythmbox and none of notify-osd, therefore I'm reassigning this to rhythmbox.
In that case rhythmbox should update the bubble correctly. Examples for doing this can be found in notify-osd trunk (lp:notify-osd) in ./notify- osd/examples/ update- notifications. py. There's also an ANSI C example, but that's not up to date at the moment. This is solely an issue of rhythmbox and none of notify-osd, therefore I'm reassigning this to rhythmbox.