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After upgrade to version 2011.Q2.712 the next problem appear (Grid in ajax mode):
Wheh sort mode of grid is:
all date type columns of grid cannot be sorted. When sortmode is single column - all works.
With 715 fix problem remained.
Wheh sort mode of grid is:
.Sortable(sorting => sorting.SortMode(GridSortMode.MultipleColumn).OrderBy(sortOrder => sortOrder.Add(t => t.Id).Descending()))all date type columns of grid cannot be sorted. When sortmode is single column - all works.
With 715 fix problem remained.