DstoreAdapter does not work with HTTP status 204 (no content)

[susnux]

I have a lot of dgrids, so I use dstore. But I need a dojo store for dijit/form/FilteringSelect and dijit/Tree.

So I tried DstoreAdapter, but when my server responses with 204, e.g.:
query for parent=42 and there is no item with parent=42 it does nothing.

FilteringSelect and Tree still waits for a response (I see that because there is still the load-animation).

My store-code:

    store = new Rest({
        target: 'api.php/Items'
        useRangeHeaders: true,
        _renderFilterParams: function (filter) {
            var type = filter.type;
            var args = filter.args;
            if (!type)
                return [''];
            if (type === 'string')
                return [args[0]];
            return [encodeURIComponent(args[0]) + '=' + encodeURIComponent(args[1])];
        }
    });
    var search_box = new FilteringSelect({
        store: new DstoreAdapter(store),
        hasDownArrow: false,
        required: false,
        searchAttr: 'name',
        pageSize: 100
    }, 'search_box');

Note: I had to add this modified _renderFilterParams property, because without it it breaks the servers REST API, e.g. it sends:
api.php/Items?name=match=Abc*
instead of
api.php/Items?name=Abc*