If you don't test against "null", you'll get the first subview resp. 0.

This will return the first subview caused by misbehaviour of "getItemIndexByData(..)":
[code]
<method name="getItemByData" args="data">
<![CDATA[
    return data ? getItemByIndex( this.getItemIndexByData( data ) ) : null;
]]>
</method>
[/code]

This will return 0 for "null"-data, but it should return "null":
[code]
<method name="getItemIndexByData" args="data">
<![CDATA[
    if (data) {
        var svs = immediateparent.subviews;
        if (svs[0].cloneManager) {
            ...
        }
        else if( svs[0].datapath.p == data )//<-- this is the root for this issue, because "svs[0].datapath.p" may be null if there is no data..
            ...
        }
    }
    return null;
]]>
</method>
[/code]