Kirill Bondar 8/22/2011 5:01:33 PM Default view acts as the template for other views; you can use Default Columns/Default Sort there. If we would allow grouping in Default View we would likely need to extend other views with Default Group option.
Otherwise, while you can select default view in many places, it's use is strictly limited to keyword search results only; in other places you can likely use a table view with default settings and the grouping of your choice?
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