WSOD when editing any profile field - typo in method call may be the cause

Here's a patch which corrects the typo ("exeucte" to "execute") in profile.admin.inc. Should fix the WSOD badness.

Huh. My patch doesn't fix the WSOD after all. There's nothing in my PHP error log, but the following error is logged to watchdog:

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'op' in 'field list': UPDATE {profile_field} SET fid=:db_update_placeholder_0, category=:db_update_placeholder_1, title=:db_update_placeholder_2, name=:db_update_placeholder_3, explanation=:db_update_placeholder_4, visibility=:db_update_placeholder_5, page=:db_update_placeholder_6, weight=:db_update_placeholder_7, autocomplete=:db_update_placeholder_8, required=:db_update_placeholder_9, register=:db_update_placeholder_10, op=:db_update_placeholder_11, submit=:db_update_placeholder_12, form_build_id=:db_update_placeholder_13, form_token=:db_update_placeholder_14, form_id=:db_update_placeholder_15, options=:db_update_placeholder_16 WHERE (fid = :db_condition_placeholder_21) ; Array ( [:db_update_placeholder_0] => 1 [:db_update_placeholder_1] => foo [:db_update_placeholder_2] => bar [:db_update_placeholder_3] => profile_bar [:db_update_placeholder_4] => [:db_update_placeholder_5] => 3 [:db_update_placeholder_6] => [:db_update_placeholder_7] => 0 [:db_update_placeholder_8] => 0 [:db_update_placeholder_9] => 1 [:db_update_placeholder_10] => 0 [:db_update_placeholder_11] => Save field [:db_update_placeholder_12] => Save field [:db_update_placeholder_13] => form-5d88ffe128f3f38bcfd0a5cae078c0cd [:db_update_placeholder_14] => a7fb2983b75d421543eec6115c013d18 [:db_update_placeholder_15] => profile_field_form [:db_update_placeholder_16] => [:db_condition_placeholder_21] => 1 ) in profile_field_form_submit() (line 370 of /Applications/MAMP/htdocs/d7/modules/profile/profile.admin.inc).

This is as far as I can go at my skill level - we need someone who can interpret the DB error above and find the true cause of the WSOD.