No reply, as pointed the gconf key provides a solution to the issue, marking as fixed
** Changed in: gtk+2.0 (Ubuntu) Status: Needs Info => Fix Released -- GTK toolbars are too tall and not configurable https://launchpad.net/bugs/27835 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs