Issue with Date/Time Site Column with default in Grid View

[sympmarc]

When provisioning a Date/Time Site Column which has its default set to Today, the column is provisioned fine. But when it's used in a list in grid view, the text [today] shows in the cell rather than today's date. This may well be a Lists bug somehow, but creating the column manually works fine, as does turning off/on the default after provisioning, so I'm thinking there's something slightly different in how it is provisioned.

Here's an example of the XML exported by the engine:

        <Field DisplayName="Date Assigned" Type="DateTime" Required="FALSE" ID="{e0049288-dbfe-4fa0-86c7-cf32344b3108}" SourceID="{8347ba40-1814-4a57-b812-2c7dca580b0b}" StaticName="DateAssigned" Name="DateAssigned" Group="_GroupName" CustomFormatter="" EnforceUniqueValues="FALSE" FriendlyDisplayFormat="Disabled" Format="DateOnly" Indexed="FALSE" CalType="0">
          <Default>[today]</Default>
        </Field>

and an example of the behavior: