I also have the mixer plugin disappear.
The drag-n-drop workaround seems to work fine.
There is also a bug entry at http://bugzilla.xfce.org/show_bug.cgi?id=2971 for this bug.
I also have the mixer plugin disappear.
The drag-n-drop workaround seems to work fine.
There is also a bug entry at bugzilla. xfce.org/ show_bug. cgi?id= 2971
http://
for this bug.