I've got the same error. My ZC version is V1.3.9.d
My error says:
1267 Illegal mix of collations (latin1_general_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
in:
[SELECT s.*, c.countries_name, s.country_code FROM supertracker s LEFT JOIN countries c ON (c.countries_iso_code_2 = s.country_code) ORDER BY last_click DESC LIMIT 0, 10]

Is there already a solution for this?