Some themes, including the "high contrast" theme still use GNOME branding

[MathiasL97]

I have discovered that some themes, including the "high contrast" theme still use GNOME branding, this should be rectified by replacing them with the MATE logo, as consistency is important

[lukefromdc]

Adwaita is GTK's own default and thus will always be GNOME branded. GTK also used to ship their own high contrast theme, not sure if they still do. Note that GTK builtins are compiled into GTK and no installed into /usr/share/themes. MATE has nothing to so with these but does need to work properly when one (perhaps adwaita-dark) is selected bu a user.

[githubmannen]

it doesn't happen for me, but i'm using Fedora-MATE compiz, so the fedora logo stays.