Hi,
When the ComboBox is disabled, the control is blurred and no special image is set to it... You can change this behavior by overriding it in your theme.
Within the common.ie.css there is a definition of:
.Common-Disabled
{
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=40);
}
(There exists a common.moz.css for Firefox as well…)
You can try to override it within ComboBox.css. This should work due to the scoping mechanism of the internal VWG engine. However, in case it does not work, please let us know.
Regards,
Itzik Spitzen