I have a custom checkbox field, with a value list associated with it. When I try to import into the field, I get an error "'1' is not a valid option for field." "1" is definitely not the data in my .csv file (and as I am testing imports I pulled the values in there directly from the value list so I know they are valid for the field). The error messages for all of the entries say that "1" is not a valid option (though each entry has different data in the field).
I searched the old Civi forums and didn't see an answer to this there either.