Comment # 5 on bug 980001 from Henrique Meira

Same issue. The Bauer's trick works fine.

But for portuguese locale, I think is better to describe how to arrive to the
configuration:

"Configura��es do sistema" -> "Apar�ncia" -> "Estilo dos aplicativos" ->
"Estilo dos aplicativos GNOME (GTK)" -> "Selecione um tema do GTK3"

Change to "Adwaita".