This bug is related to loading GTK2+ style assets. MATE Panel was ported to GTK3+ for 1.18 and this issue will not be fixed since MATE 1.12 is no longer supported.
This bug is related to loading GTK2+ style assets. MATE Panel was ported to GTK3+ for 1.18 and this issue will not be fixed since MATE 1.12 is no longer supported.