Thanks for the quick reply. Here's a copy/paste of the grid itself from production code

            <igGrid:XamWebGrid
                VerticalAlignment="Stretch"
                HorizontalAlignment="Stretch"
                HorizontalContentAlignment="Stretch"
                VerticalContentAlignment="Stretch"
                ItemsSource="{Binding ReferencePoints}"
                Behaviors:XamWebGridCurrentItemBindingBehavior.CurrentCollectionView="{Binding ReferencePoints}"
                UseLayoutRounding="True"
                AutoGenerateColumns="False"   
               
                CellStyle="{StaticResource CellControlStyleForColouredRows}"
                IsAlternateRowsEnabled="True"
                RowHover="Row"
                ColumnLayoutHeaderVisibility="Never"
                RowHeight="Dynamic"
                ColumnWidth="*"
                HeaderVisibility="Visible" >
                <igGrid:XamWebGrid.AddNewRowSettings>
                    <igGrid:AddNewRowSettings AllowAddNewRow="None" />
                </igGrid:XamWebGrid.AddNewRowSettings>
                <igGrid:XamWebGrid.RowSelectorSettings>
                    <igGrid:RowSelectorSettings EnableRowNumbering="False" />
                </igGrid:XamWebGrid.RowSelectorSettings>
                <igGrid:XamWebGrid.SortingSettings>
                    <igGrid:SortingSettings AllowMultipleColumnSorting="True" AllowSorting="True" ShowSortIndicator="True" />
                </igGrid:XamWebGrid.SortingSettings>
                <igGrid:XamWebGrid.SelectionSettings>
                    <igGrid:SelectionSettings
                        CellClickAction="SelectRow"
                        CellSelection="None"
                        ColumnSelection="None"
                        RowSelection="Single"
                    />
                </igGrid:XamWebGrid.SelectionSettings>
                <igGrid:XamWebGrid.ColumnResizingSettings>
                    <igGrid:ColumnResizingSettings AllowDoubleClickToSize="True" AllowColumnResizing="Immediate" />
                </igGrid:XamWebGrid.ColumnResizingSettings>

                <igGrid:XamWebGrid.Columns>

                    <igGrid:TemplateColumn Key="EditButton" IsReadOnly="True" IsResizable="False" Width="SizeToCells" IsSortable="False" MinimumWidth="5" HeaderStyle="{StaticResource HeaderCellControlStyleForNoSorting}">
                        <igGrid:TemplateColumn.ItemTemplate>
                            <DataTemplate>
                                <Button
                                    Command:Click.Command="{Binding Path=Value, Source={StaticResource EditSymbolCommand}}"
                                    Command:Click.CommandParameter="{Binding }"
                                    Behaviors:ToolTipBindingBehavior.ToolTipContent="{Binding Resource.ReferencePointEditSymbol, Source={StaticResource LocalizedStrings}}"
                                    Margin="0" Padding="3,0,3,0" >
                                    <Image Source="{Binding Configuration, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                                </Button>
                            </DataTemplate>
                        </igGrid:TemplateColumn.ItemTemplate>
                        <igGrid:TemplateColumn.HeaderTemplate>
                            <DataTemplate>
                                <Image Source="{Binding Configuration, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                            </DataTemplate>
                        </igGrid:TemplateColumn.HeaderTemplate>
                    </igGrid:TemplateColumn>

                    <igGrid:TemplateColumn Key="RenameButton" IsReadOnly="True" IsResizable="False" Width="SizeToCells" IsSortable="False" MinimumWidth="5" HeaderStyle="{StaticResource HeaderCellControlStyleForNoSorting}">
                        <igGrid:TemplateColumn.ItemTemplate>
                            <DataTemplate>
                                <Button
                                    Command:Click.Command="{Binding Path=Value, Source={StaticResource RenameCommand}}"
                                    Command:Click.CommandParameter="{Binding }"
                                    Behaviors:ToolTipBindingBehavior.ToolTipContent="{Binding Resource.ReferencePointRename, Source={StaticResource LocalizedStrings}}"
                                    Margin="0" Padding="3,0,3,0" >
                                    <Image Source="{Binding GroupRename, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                                </Button>
                            </DataTemplate>
                        </igGrid:TemplateColumn.ItemTemplate>
                        <igGrid:TemplateColumn.HeaderTemplate>
                            <DataTemplate>
                                <Image Source="{Binding GroupRename, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                            </DataTemplate>
                        </igGrid:TemplateColumn.HeaderTemplate>
                    </igGrid:TemplateColumn>

                    <igGrid:TemplateColumn Key="DeleteButton" IsReadOnly="True" IsResizable="False" Width="SizeToCells" IsSortable="False" MinimumWidth="5" HeaderStyle="{StaticResource HeaderCellControlStyleForNoSorting}">
                        <igGrid:TemplateColumn.ItemTemplate>
                            <DataTemplate>
                                <Button
                                    Command:Click.Command="{Binding Path=Value, Source={StaticResource DeleteCommand}}"
                                    Command:Click.CommandParameter="{Binding }"
                                    Behaviors:ToolTipBindingBehavior.ToolTipContent="{Binding Resource.DeleteReferencePoint, Source={StaticResource LocalizedStrings}}"
                                    Margin="8,0,0,0" Padding="3,0,3,0" >
                                    <Image Source="{Binding Delete, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                                </Button>
                            </DataTemplate>
                        </igGrid:TemplateColumn.ItemTemplate>
                        <igGrid:TemplateColumn.HeaderTemplate>
                            <DataTemplate>
                                <Image Source="{Binding Delete, Source={StaticResource ImagesPath}}" VerticalAlignment="Center" HorizontalAlignment="Center" Width="12" Stretch="Uniform"/>
                            </DataTemplate>
                        </igGrid:TemplateColumn.HeaderTemplate>
                    </igGrid:TemplateColumn>


                    <igGrid:TemplateColumn Key="SymbolAddress" Width="SizeToCells" VerticalContentAlignment="Center" HorizontalContentAlignment="Center">
                        <igGrid:TemplateColumn.ItemTemplate>
                            <DataTemplate>
                                <Image Source="{Binding SymbolAddress}" Stretch="None" Margin="5,0,5,0" />
                            </DataTemplate>
                        </igGrid:TemplateColumn.ItemTemplate>
                        <igGrid:TemplateColumn.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Resource.ReferencePointHeaderSymbol, Source={StaticResource LocalizedStrings}}" />
                            </DataTemplate>
                        </igGrid:TemplateColumn.HeaderTemplate>
                    </igGrid:TemplateColumn>

                    <igGrid:TextColumn Key="Name" Width="SizeToCells">
                        <igGrid:TextColumn.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Resource.ReferencePointHeaderName, Source={StaticResource LocalizedStrings}}" />
                            </DataTemplate>
                        </igGrid:TextColumn.HeaderTemplate>
                    </igGrid:TextColumn>


                    <igGrid:TemplateColumn Key="Filler" IsReadOnly="True" IsResizable="False" Width="*"  HeaderText=" ">
                        <igGrid:TemplateColumn.ItemTemplate>
                            <DataTemplate>
                                <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                                </Grid>
                            </DataTemplate>
                        </igGrid:TemplateColumn.ItemTemplate>
                    </igGrid:TemplateColumn>

                </igGrid:XamWebGrid.Columns>

            </igGrid:XamWebGrid>

Here's a copy/paste of the behaviour that keeps the current row in synch with the current item:

    public static class XamWebGridCurrentItemBindingBehavior
    {
        public static readonly DependencyProperty CurrentCollectionViewProperty =
            DependencyProperty.RegisterAttached("CurrentCollectionView", typeof(ICollectionView), typeof(XamWebGridCurrentItemBindingBehavior), new PropertyMetadata(OnCurrentCollectionViewSetCallback));


        public static ICollectionView GetCurrentCollectionView(DependencyObject obj)
        {
            return (ICollectionView)obj.GetValue(CurrentCollectionViewProperty);
        }

        public static void SetCurrentCollectionView(DependencyObject obj, ICollectionView value)
        {
            obj.SetValue(CurrentCollectionViewProperty, value);
        }


        private static void OnSelectedRowsCollectionChanged(object sender, SelectionCollectionChangedEventArgs<SelectedRowsCollection> e)
        {
            var grid = (DependencyObject)sender;

            var collectionView = GetCurrentCollectionView(grid);
            if (collectionView != null &&
                e.NewSelectedItems.Count > 0)
            {
                collectionView.MoveCurrentTo(e.NewSelectedItems[0].Data);
            }
        }

        private static void OnActiveCellChanging(object sender, ActiveCellChangingEventArgs e)
        {
            e.Cancel = true;
        }

        private static void OnCurrentChanged(XamWebGrid grid)
        {
            var collectionView = GetCurrentCollectionView(grid);
            if (collectionView != null)
            {
                if (collectionView.CurrentItem == null)
                {
                    grid.SelectionSettings.SelectedRows.Clear();
                }
                else
                {
                    Row rowToSelect = grid.Rows.FirstOrDefault(r => r.Data == collectionView.CurrentItem);
                    if (rowToSelect == null)
                    {
                        grid.SelectionSettings.SelectedRows.Clear();
                    }
                    else
                    {
                        if (grid.SelectionSettings.SelectedRows.Count != 1
                             ||
                                 (
                                     grid.SelectionSettings.SelectedRows.Count == 1 &&
                                     grid.SelectionSettings.SelectedRows[0] != rowToSelect
                                 )
                             )
                        {
                            rowToSelect.IsSelected = true;
                            grid.ScrollCellIntoView(rowToSelect.Cells[0]);
                        }
                    }
                }
            }
        }

        private static void OnCurrentCollectionViewSetCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var oldCollection = (ICollectionView)e.OldValue;
            var newCollection = (ICollectionView)e.NewValue;
            var grid = (XamWebGrid)d;

            if (oldCollection != null)
            {
                oldCollection.CurrentChanged -= (o, ev) => OnCurrentChanged(grid);
            }
            if (newCollection != null)
            {
                newCollection.CurrentChanged += (o, ev) => OnCurrentChanged(grid);
            }

            grid.SelectedRowsCollectionChanged -= OnSelectedRowsCollectionChanged;
            grid.ActiveCellChanging -= OnActiveCellChanging;

            grid.SelectedRowsCollectionChanged += OnSelectedRowsCollectionChanged;
            grid.ActiveCellChanging += OnActiveCellChanging;
        }
    }

And in my code what I do on an update is:

            var savedPosition = _referencePoints.CurrentPosition;

            using (_referencePoints.DeferRefresh())
            {
                _referencePoints.Clear();
                foreach (var referencePoint in referencePoints)
                {
                    _referencePoints.Add(new ReferencePointWithAddress(referencePoint, _profileAddressHelperService, _profileService));
                }
            }

            if (savedPosition < _referencePoints.Count)
            {
                SynchronizationContext.Current.Post((o) => _referencePoints.MoveCurrentToPosition(savedPosition), null);
            }

Cheers.