Some fields aren't processed by the UTF-8 migration under Moodle 1.7:
- mdl_data->jstemplate
- mdl_enrol_authorize->paymentmethod
- mdl_hotpot_questions->md5key
- mdl_hotpot_strings->md5key
- mdl_role->shortname
- mdl_stats_daily->stattype
- mdl_stats_monthly->stattype
- mdl_stats_weekly->stattype