Comment 3 for bug 1576576

Not that this is really avoidable - more a question of time and effort - but the Gtk3.20 update will most likely result in the need for a rewrite of the default Xubuntu Gtk+ theme (Greybird), but as its codebase is comparable to that of the light-themes those would be hit by the same fate.

Naturally we can all switch to new and different themes, which already support 3.20. However this is something that shouldn't go unmentioned and unplanned.