ListGridField, canExport and getValueIcon

SmartClient Version: v9.1p_2014-08-31/Pro Deployment (built 2014-08-31)
FF 24.8.0 ESR

We have a list grid field displaying a value icon. That list grid field has canExport:false, yet when exporting to PDF the field is still exported.

If I export to XLS the canExport property is honoured and the field is not exported.

Thanks