I try to bind some data on a UltraWebGrid 10.3. Everything went fine  on IE and Chrome browsers and Framework 2.0. When I switch the application to framework 4.0 in Chrome no class attribute is rendered. For rows data I fixed this after I set OptimizeCSSClassNamesOutput=false, but for header I wasn't able to make the grid to render the class attributes in the output html.

The style file is properly linked to the page and the css classes are set to the grid like this:

<igtbl:UltraWebGrid ID="UltraWebGrid1" runat="server" Height="350px" Width="400px">

<DisplayLayout>                            

<HeaderStyleDefault CssClass="infragisticsWebGridHeader"></HeaderStyleDefault>

<RowStyleDefault CssClass="infragisticsWebGridRow"></RowStyleDefault>

<RowAlternateStyleDefault CssClass="infragisticsWebGridRowAlternate"></RowAlternateStyleDefault>

<RowSelectorStyleDefault CssClass="infragisticsWebGridRowSelector"></RowSelectorStyleDefault>

<SelectedRowStyleDefault CssClass="infragisticsWebGridSelectedRow"></SelectedRowStyleDefault>

</DisplayLayout>

</igtbl:UltraWebGrid>

From the attachment you can see the class attributes are properly rendered in IE + Framework 4 but not for Chrome + Framework 4.

Any suggestion is welcome.

Thank you in advance,