Vertical inline toolbars styling of linked buttons is broken
Reopened from https://bugzilla.gnome.org/show_bug.cgi?id=738474 and summarized (that one had a couple of comments):
As the screenshot below demonstrates, inline toolbars have an incorrect style when oriented vertically, particularly when using linked buttons (you can also notice the problem in widget-factory if you add "inline-toolbar" to Style Classes for the vertical GtkToolbar on the 3rd page):
Edited by Emmanuele Bassi