arch linux xfce4-notifyd 0.6.0 gtk 3.24.17 mytheme/xfce-notify-4.0/gtk.css #XfceNotifyWindow { background-color: #FFEBD6; border-radius: 6px; border: 1px solid shade(#EAD8C4, 0.5); } Since version 0.6.0 the border-radius property do not work. (but with version 0.4.4. is ok)
Do you have compositing enabled?
Compositing disabled. I've checked: if compositing enabled then border-radius will work. This is strange.
It's not strange. Rounded corners only work properly with compositing.
For reference, see https://bugzilla.xfce.org/show_bug.cgi?id=16586