We discussed it at GUADEC, the GNOME design is to use symbolic icons in the panel and our theme is missing ones to match our icons which creates the difference. But even if we fix the theme third party apps (and some of the default ones) are going to display a colored icon (e.g firefox) and it's going to be difficult to have visual conistency. One way would be to change the Ubuntu session to not display symbolic icons but always the normal one...
We discussed it at GUADEC, the GNOME design is to use symbolic icons in the panel and our theme is missing ones to match our icons which creates the difference. But even if we fix the theme third party apps (and some of the default ones) are going to display a colored icon (e.g firefox) and it's going to be difficult to have visual conistency. One way would be to change the Ubuntu session to not display symbolic icons but always the normal one...