Atomic update remove does not work for int array or date array

curl http://localhost:8080/update\?commit\=true -H 'Content-type:application/json' -d '[{ "attr_birth_year_is": { "remove": [1960]},  "id": 1098}]'

curl http://localhost:8080/update\?commit\=true -H 'Content-type:application/json' -d '[{"reserved_on_dates_dts": {"remove": ["2014-02-12T12:00:00Z", "2014-07-16T12:00:00Z", "2014-02-15T12:00:00Z", "2014-02-21T12:00:00Z"]}, "id": 1098}]'