If you want to remove border for an application you've to set the "No titlebar and frame" rule in "Appearance & Fixes", but this make the application displayed on every activity running. Steps to reproduce: - Choice an application - Alt + F3 -> Advanced -> Special Application Settings -> Appearance & Fixes -> No titlebar and frame -> Apply -> Yes -> OK - Close the application - Open the application - Switch activity
not rule specific and currently "intended" behavior. see dupe. *** This bug has been marked as a duplicate of bug 271925 ***