GNOME Bugzilla – Bug 762067
Adwaita: half maximized unfocused window has rounded corners
Last modified: 2016-02-15 11:37:49 UTC
Created attachment 321237 [details] left terminal should not have a rounded corner. The backdrop state of the half maximized window seems to have lost its non-roundiness. Screenshot attached.
This problem has been fixed in the unstable development version. The fix will be available in the next major software release. You may need to upgrade your Linux distribution to obtain that newer version.