I have been implementing a custom eccomerce provider and have noticed a minor bug.

The CMS Desk -> Tools -> Manufacturers tab does not use the custom provider to list the Manufacturers.

I have resolved the issue by removing the query element from the Manufacturer_List.xml file, and then setting up a UniGrid.OnDataReload event as follows:

DataSet UniGrid_OnDataReload(string completeWhere)
{
return ManufacturerInfoProvider.GetManufacturerInfos(completeWhere, null);
}