I experienced the same problems like you all. As I regularly use inkscape I searched for a workaround other than changing the icon set each time I have to run Inkscape. I found one, that worked for me:
I looked into '/usr/share/themes/QtCurve/gtk-2.0/gtkrc' and wondered about one of the first lines:
gtk-fallback-icon-theme="gnome"
As I have not installed gnome, why the fallback should be gnome and not oxygen. Thus I changed to:
gtk-fallback-icon-theme="oxygen"
Now, all works fine with oxygen icons in Inkscape. Hopefully, that will work for you all too. Please let us know here.
I experienced the same problems like you all. As I regularly use inkscape I searched for a workaround other than changing the icon set each time I have to run Inkscape. I found one, that worked for me:
I looked into '/usr/share/ themes/ QtCurve/ gtk-2.0/ gtkrc' and wondered about one of the first lines: icon-theme= "gnome"
gtk-fallback-
As I have not installed gnome, why the fallback should be gnome and not oxygen. Thus I changed to: icon-theme= "oxygen"
gtk-fallback-
Now, all works fine with oxygen icons in Inkscape. Hopefully, that will work for you all too. Please let us know here.