Use attached to reproduce:
- Just search for something and you will notice that the waiting bar does not disappear. 

Workaround:
public RadForm1()
{
    InitializeComponent();

    
    radGridView1.MasterView.TableSearchRow.IsSearchAsync = false;
    radGridView1.MasterView.TableSearchRow.SearchProgressChanged += TableSearchRow_SearchProgressChanged;

}

private void TableSearchRow_SearchProgressChanged(object sender, SearchProgressChangedEventArgs e)
{
    var searchCell = radGridView1.TableElement.FindDescendant<GridSearchCellElement>();
    if (searchCell != null)
    {
        var waitingBar = searchCell.Children[1] as RadWaitingBarElement;
        waitingBar.StopWaiting();
        waitingBar.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
    }
}

To reproduce:
- Set IsSearchAsync to false.
- Search for something and press down arrow to navigate to the last found item.
- Press down again the selection is not moved to the first item.
 

Use attached to reproduce.

Workaround:
private void RadGridView1_UserAddingRow(object sender, GridViewRowCancelEventArgs e)
{
    e.Cancel = true;
}

Use attached to reproduce.
- Check then try to uncheck the rows.

Workaround:
private void RadGridView1_CreateCell(object sender, GridViewCreateCellEventArgs e)
{
    if (e.CellType == typeof(GridCheckBoxHeaderCellElement))
    {
        e.CellElement = new MyHeaderCheckboxCellElement(e.Column, e.Row);
    }
}

class MyHeaderCheckboxCellElement : GridCheckBoxHeaderCellElement
{
    public MyHeaderCheckboxCellElement(GridViewColumn col, GridRowElement row) : base (col, row)
    { }
    protected override void checkbox_ToggleStateChanged(object sender, StateChangedEventArgs args)
    {
        base.checkbox_ToggleStateChanged(sender, args);
        var prop = this.ViewInfo.GetType().GetProperty("Version", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
        int value = (int)prop.GetValue(this.ViewInfo);
        prop.SetValue(this.ViewInfo, --value);

    }
}

Use attached to reproduce.
- Open the data filter dialog from the excel-like filtering on the date column.
- The date time format in the editor is not respected.
- Consider the default cell editor as well.  

Workaround:

private void RadGridView1_CreateCompositeFilterDialog(object sender, GridViewCreateCompositeFilterDialogEventArgs e)
{
    var dialog = e.Dialog as CompositeDataFilterForm;
    dialog.DataFilter.EditorInitialized -= DataFilter_EditorInitialized;
    dialog.DataFilter.EditorInitialized += DataFilter_EditorInitialized;
 
    dialog.DataFilter.NodeFormatting -= DataFilter_NodeFormatting;
    dialog.DataFilter.NodeFormatting += DataFilter_NodeFormatting;
}
 
private void DataFilter_NodeFormatting(object sender, TreeNodeFormattingEventArgs e)
{
    var criteriaNode = e.NodeElement as DataFilterCriteriaElement;
    if (criteriaNode != null)
    {
        var node = criteriaNode.Data as DataFilterCriteriaNode;
        if (node.DescriptorValue != null && node.PropertyName == "Date")
        {
            criteriaNode.ValueElement.Text = ((DateTime?)node.DescriptorValue).Value.ToString("MM/dd/yyyy");
        }
    }
}
 
private void DataFilter_EditorInitialized(object sender, TreeNodeEditorInitializedEventArgs e)
{
    var editor = e.Editor as TreeViewDateTimeEditor;
    if (editor != null)
    {
        var element = editor.EditorElement as BaseDateTimeEditorElement;
        element.Format = DateTimePickerFormat.Custom;
        element.CustomFormat = "dd/MM/yyyy";
    }
}
 

To reproduce: setup self-reference hierarchy. Add a GridViewHyperlinkColumn and show the expander item in this column. Please refer to the attached screenshot. The hyperlink text overlaps with the expander.

Workaround: set the MasterTemplate.SelfReferenceExpanderColumn to a different column. 

Use attached to reproduce.
- Edit random cell and press Enter.
- Check the CellValueChanged event handler, the changes variable is null.

This will work if you comment the OnShown method.

Workaround:
IEditableObject editbaleObject = radGridView1.CurrentRow.DataBoundItem as IEditableObject;
if (editbaleObject != null)
{
     editbaleObject.EndEdit();
}

How to reproduce: bind the grid using the code snippet below and enter name in the SearchRow
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    public RadForm1()
    {
        InitializeComponent();

        this.radGridView1.DataSource = this.GetData();
        this.radGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;
        this.radGridView1.AllowSearchRow = true;

        this.radGridView1.MasterView.TableSearchRow.InitialSearchResultsTreshold = 0;
        this.radGridView1.MasterView.TableSearchRow.SearchResultsGroupSize = int.MaxValue;;
    }

    private DataTable GetData()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("Id", typeof(int));
        dt.Columns.Add("Name", typeof(string));
        dt.Columns.Add("Date", typeof(DateTime));
        dt.Columns.Add("Bool", typeof(bool));
        dt.Columns.Add("Description", typeof(string));
        for (int i = 0; i < 2000; i++)
        {
            for (int j = 0; j < 5; j++)
            {
                dt.Rows.Add(i, "Name " + j, DateTime.Now.AddDays(i), i % 2 == 0 , "Description " + i);
            }
        }

        return dt;
    }
}

Workaround: in the search row, set the InitialSearchResultsTreshold property to 0 and the SearchResultsGroupSize property to int.MaxValue
public RadForm1()
{
    InitializeComponent();

    this.radGridView1.DataSource = this.GetData();
    this.radGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;
    this.radGridView1.AllowSearchRow = true;

    this.radGridView1.MasterView.TableSearchRow.SearchProgressChanged += TableSearchRow_SearchProgressChanged;
    this.radGridView1.MasterView.TableSearchRow.InitialSearchResultsTreshold = 0;
    this.radGridView1.MasterView.TableSearchRow.SearchResultsGroupSize = int.MaxValue;
}

To reproduce:
GridViewCheckBoxColumn chkCol = new GridViewCheckBoxColumn();

chkCol.HeaderText = "I have wrap text set yet I cannot see full column header text.";
chkCol.Width = 90;
chkCol.WrapText = true;
chkCol.EnableHeaderCheckBox = true;
chkCol.EditMode = EditMode.OnValueChange;
radGridView1.Columns.Add(chkCol);

Workaround:
private void RadGridView1_ViewCellFormatting(object sender, CellFormattingEventArgs e)
{
    var cell = e.CellElement as GridCheckBoxHeaderCellElement;
    if (cell != null)
    {
        cell.CheckBox.TextWrap = true;
    }
}

Use attached to reproduce!

Workaround:
remove the Begin\End update block.

To reproduce: run the sample approach an follow the steps:

1. Filter the "Mask" column by entering " " in the filter cell. Press Enter. The grid is filtered as expected. 
2. Activate the editor again and press Backspace+Enter. You will notice that it is not possible to clear the applied filter.

Workaround: use GridViewTextBoxColumn 

To reproduce:
 private void radButton1_Click(object sender, EventArgs e)
        {
            RadPrintDocument printDocument = new RadPrintDocument();
            printDocument.DefaultPageSettings.Landscape = true; 
            printDocument.DocumentName = "Example Case";

            GridPrintStyle style = new GridPrintStyle(this.radGridView1)
            {
                FitWidthMode = PrintFitWidthMode.FitPageWidth,
                PrintGrouping = false,
                PrintSummaries = false,
                PrintHeaderOnEachPage = true,
                PrintHiddenColumns = false,
            };
            
            TableViewDefinitionPrintRenderer renderer = new TableViewDefinitionPrintRenderer(this.radGridView1);
            renderer.PrintPages.Add(
                this.radGridView1.Columns[1],
                this.radGridView1.Columns[2],
                this.radGridView1.Columns[3],
                this.radGridView1.Columns[4],
                this.radGridView1.Columns[5],
                this.radGridView1.Columns[6]);
            style.PrintRenderer = renderer;
            this.radGridView1.PrintStyle = style;

            this.radGridView1.PrintCellFormatting += RadGridView1_PrintCellFormatting;
            radGridView1.Print(true, printDocument);     
        }

        private void RadGridView1_PrintCellFormatting(object sender, Telerik.WinControls.UI.PrintCellFormattingEventArgs e)
        {
        }

Workaround: use the PrintCellFormatting  of the TableViewDefinitionPrintRenderer 

To reproduce:

 if (e.CellElement.ColumnInfo.HeaderText == "CategoryID")
{
     e.CellElement.DrawText = false;
}
else
{
      e.CellElement.ResetValue(LightVisualElement.DrawTextProperty, ValueResetFlags.Local);
}

Workaround:
 
e.CellElement.DrawText = true;

Hi,

We got an issue comparable to the one already described (see 245938), using the same demo project
1) I add LastDeliveryDateTimeLocal column
2) remove groups
3) click on "Start async notifications"
4) click on the filter icon next to "LastDeliveryDateTimeLocal" column name
5) uncheck some values (08/09/2016, 11/11/2016, 03/01/2017)
6) click Ok
=> NullReferenceException

Use attached to reproduce.

Workaround:
class MySpreadExportRenderer : SpreadExportRenderer
{
    public override void SetWorksheetColumnWidth(int columnIndex, double value, bool isCustom)
    {
        if (value > 2000)
        {
            value = 2000;
        }
        base.SetWorksheetColumnWidth(columnIndex, value, isCustom);
    }
}

How to reproduce: check the attached project and comment the workaround

Workaround: 
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    private BindingList<TestDataObject> data;
    public RadForm1()
    {
        InitializeComponent();

        this.data = new BindingList<TestDataObject>();
        this.LoadData();

        GridViewTextBoxColumn textColumn = new GridViewTextBoxColumn();
        textColumn.Name = "Name";
        textColumn.FieldName = "Name";
        textColumn.HeaderText = "Name";
        this.radGridView1.Columns.Add(textColumn);

        GridViewDateTimeColumn dateColumn = new GridViewDateTimeColumn();
        dateColumn.Name = "Date";
        dateColumn.FieldName = "Date";
        dateColumn.HeaderText = "Date";
        this.radGridView1.Columns.Add(dateColumn);

        GridViewMaskBoxColumn maskBoxColumn = new GridViewMaskBoxColumn();
        maskBoxColumn.Name = "Price";
        maskBoxColumn.FieldName = "Price";
        maskBoxColumn.HeaderText = "Price";
        maskBoxColumn.MaskType = MaskType.Numeric;
        maskBoxColumn.Mask = "C";
        maskBoxColumn.TextAlignment = ContentAlignment.BottomRight;
        maskBoxColumn.FormatString = "{0:C}";
        maskBoxColumn.DataType = typeof(decimal);
        this.radGridView1.Columns.Add(maskBoxColumn);

        this.radGridView1.DataSource = this.data;
        this.radGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

        //Workaround
        this.radGridView1.CellBeginEdit += RadGridView1_CellBeginEdit;
        this.radGridView1.EditorRequired += RadGridView1_EditorRequired;
    }

    void RadGridView1_EditorRequired(object sender, EditorRequiredEventArgs e)
    {
        if (e.EditorType == typeof(RadMaskedEditBoxEditor))
        {
            e.EditorType = typeof(MyRadMaskedEditBoxEditor);
        }
    }

    private void RadGridView1_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
    {
        RadMaskedEditBoxEditor maskedEditBoxEditor = e.ActiveEditor as RadMaskedEditBoxEditor;
        if (maskedEditBoxEditor != null && e.Row.Cells[e.ColumnIndex].Value == null)
        {
            maskedEditBoxEditor.MaskTextBox.EnableNullValueInput = true;
        }
        else
        {
            maskedEditBoxEditor.MaskTextBox.EnableNullValueInput = false;
        }
    }

    private void LoadData()
    {
        for (int i = 0; i < 1000; i++)
        {
            decimal? price = null;
            if (i % 2 == 0)
            {
                price = i * 100;
            }

            this.data.Add(new TestDataObject
            {
                Name = "Name " + i,
                Date = DateTime.Now.AddDays(i),
                Price = price
            });
        }
    }
}

public class TestDataObject
{
    public string Name { get; set; }

    public DateTime Date { get; set; }

    public decimal? Price { get; set; }
}

public class MyRadMaskedEditBoxEditor : RadMaskedEditBoxEditor
{
    public override object Value
    {
        get
        {
            return base.Value;
        }
        set
        {
            if (value == null && (this.MaskTextBox.EnableNullValueInput || this.MaskTextBox.MaskType != MaskType.Numeric))
            {
                this.MaskTextBox.Value = this.NullValue;
            }
            else
            {
                base.Value = value;
            }
        }
    }
}

To reproduce: please refer to the attached gif file illustrating the steps how to reproduce the problem with the Demo application. 

Workaround:

        private void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)
        {
            GridDataCellElement cell = e.CellElement as GridDataCellElement;
            if (cell != null)
            {
                if (cell.ContainsErrors)
                {
                    cell.DrawBorder = true;
                    cell.BorderBoxStyle = BorderBoxStyle.FourBorders;

                    cell.BorderBottomColor = cell.BorderTopColor = cell.BorderRightShadowColor = cell.BorderLeftShadowColor = Color.Transparent;
                    cell.BorderBottomShadowColor = cell.BorderTopShadowColor = cell.BorderRightColor = cell.BorderLeftColor = Color.Red;
                    cell.BorderBottomWidth = cell.BorderTopWidth = cell.BorderRightWidth = cell.BorderLeftWidth = 1;

                    cell.BorderDrawMode = BorderDrawModes.HorizontalOverVertical;
                    cell.ZIndex = 2;
                }
                else
                {
                    cell.ResetValue(LightVisualElement.DrawBorderProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderBoxStyleProperty, ValueResetFlags.Local);

                    cell.ResetValue(LightVisualElement.BorderBottomColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderBottomShadowColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderBottomWidthProperty, ValueResetFlags.Local);

                    cell.ResetValue(LightVisualElement.BorderTopColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderTopShadowColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderTopWidthProperty, ValueResetFlags.Local);

                    cell.ResetValue(LightVisualElement.BorderLeftColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderLeftShadowColorProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.BorderLeftWidthProperty, ValueResetFlags.Local);

                    cell.ResetValue(LightVisualElement.BorderDrawModeProperty, ValueResetFlags.Local);
                    cell.ResetValue(LightVisualElement.ZIndexProperty, ValueResetFlags.Local);
                }
            }
        }

To reproduce: please refer to the attached sample gif file. Note that it is important that the child template is bound at design time and the columns are automatically generated. 

Workaround: setup the ViewDefinition programmatically:  

Use attached to reproduce.

Workaround:
private void RadGridView1_ColumnChooserCreated(object sender, Telerik.WinControls.UI.ColumnChooserCreatedEventArgs e)
{
    var columnChooser = e.ColumnChooser as GridViewColumnChooser;
    columnChooser.Shown -= ColumnChooser_Shown;
    columnChooser.Shown += ColumnChooser_Shown;
  
}

private void ColumnChooser_Shown(object sender, EventArgs e)
{
    var columnChooser = sender as GridViewColumnChooser;
    var factor = this.FormElement.DpiScaleFactor;
    columnChooser.Scale(factor);
}