Bug HintStyle

[Tarak]

1. SmartClient v91d/LGPL\"

2. Chrome 31.0.1650.57

Today I updated smart client version from 9.0 to 9.1 and here are the results:
I use Combobox with "HintInField" and after I choose setValue the hint style doesn’t change to normal, but after formItem get the focus the style become normal. In version 9.0 it always worked.
Could you tell me please what is the problem here?

 isc.DynamicForm.create({
        ID:"arrivalForm-"+id,
        width:300,
        height:30,
        top:0,
        border:"0px",
        fields : [
            {
                name: "filteredCombo",
                textBoxStyle: "dynamicform",
                width:300,
                hint:'hintText',               
                showHintInField: true,
                showTitle:false,
                height:30,
                editorType: "ComboBoxItem",
                addUnknownValues:false,
                showPickerIcon: false,
                optionDataSource: "AirportSearch",
                displayField:"concatForDispl",
                valueField:"id"
....

style:

.dynamicformHint{
    font-family: Geneva, Arial, Helvetica,cursive;
    color: #b7b6b8;
    font-style: italic;
}
.dynamicform{
    color: #000000;
    font-style: normal;
}