mysqladmin no ubuntu

Tento realizar um restore do backup, pelo front-end do mysql, no processamento de restore, sempre fecha o mysqladmin.
Então resolvi executar o mysqladmin via console pelo "sudo mysql-admin", tentei realizar o mesmo procedimento ... ocorre o seguinte erro no console:

(mysql-admin:2080): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated

(mysql-admin:2080): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated

(mysql-admin:2080): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
mysql-admin: myx_international_file.c:148: wrong_invalid_chars_at_the_end: Assertion `g_utf8_get_char_validated(invalid_chars,wrong_size) ==(gunichar)-1' failed.

O que seria isso?