This issue happens for me when I use the rhythmbox toolbar volume control.
If I change the system volume control, or use the sound preferences dialog by right-clicking on the panel icon to alter the rhythmbox volume, then all is fine, but if I try to change the volume from the toolbar in Rhythmbox then Rhythmbox crashes.
For now I have just hidden the rhythmbox toolbar.
I am running 9.10 installed clean, not upgraded, with all updates as of today.
This issue happens for me when I use the rhythmbox toolbar volume control.
If I change the system volume control, or use the sound preferences dialog by right-clicking on the panel icon to alter the rhythmbox volume, then all is fine, but if I try to change the volume from the toolbar in Rhythmbox then Rhythmbox crashes.
For now I have just hidden the rhythmbox toolbar.
I am running 9.10 installed clean, not upgraded, with all updates as of today.