To reproduce:
- Add a grid with some columns to a blank form (the rows should not fill the entire space).
- Press and hold the left mouse button, the move the mouse to the empty area of the grid.
- Continue to move the mouse and you will notice the event is fired several times.

Workaround:
- use the CurrentCellChanged event.

Currently none of the exporters can be canceled.

http://screencast.com/t/mZDwbWS8

WORKAROUND:
Set the UseCompatibleTextRendering property of RadGridView to false.

Add a feature for default image similar to the DefaultText.

Allow hiding the SummaryRowItems in RadGridView's Groups

Resolution: Individual cells cannot have specific FormatString since the property is bound to column's FormatString 

When a RadGridView instance is initialized in the Form's constructor, the grid is not assigned a binding context.
Note: This is a desired behavior.

To reproduce:
- Add a grid to a form and open the property builder
- Add couple columns and group by some of the columns
- Press ok -> the grid is grouped
- Open the Property Builder again, click the X button of the group to remove it and click the OK button of the Property Builder -> the group is not removed.

RadGridView cannot display any data when bound to a List<IObject> filled with different implementations of the interface.

Steps to reproduce:

1. Addd a numeric (decimal) column to a grid
2. Enable filtering 
3. Select 'Greater Than' filter
4. Enter '0' in the Spin Editor that appears

You will see that no filtering occurs. Enter any other digit instead of 0 and filtering is performed.

When scrolling to the bottom of the grid with the mouse, the last row is not lined up with the bottom of the grid. Also, when doing this, clicking on any row, leads to row jumping down to align properly, but a different row is selected.

Workaround:

public Form1()
{
    InitializeComponent();
    radGridView1.MouseDown+=radGridView1_MouseDown;
    radGridView1.MouseUp+=radGridView1_MouseUp;
}
bool scrolling = false;

private void radGridView1_MouseDown(object sender, MouseEventArgs e)
{
    ScrollBarThumb thumb = radGridView1.ElementTree.GetElementAtPoint(e.Location) as ScrollBarThumb;
    if (thumb != null)
    {
        scrolling = true;
    }
}

private void radGridView1_MouseUp(object sender, MouseEventArgs e)
{
    if (scrolling)
    {
        scrolling = false;
        int scrollBarValue = radGridView1.TableElement.VScrollBar.Value;
        radGridView1.MasterTemplate.Refresh();
        radGridView1.TableElement.VScrollBar.Value = scrollBarValue;
    }
}

To reproduce:
- add a grid to the form and use the following code for its setup:
            radGridView2.Columns.Add("ID");
            radGridView2.Columns.Add("Title");
            radGridView2.MultiSelect = true;
            radGridView2.Columns[0].SortOrder = RadSortOrder.Ascending;
            radGridView2.ReadOnly = true;

            radGridView2.BeginUpdate();
            for (int i = 0; i < 5; i++)
            {
                GridViewDataRowInfo row = new GridViewDataRowInfo(radGridView2.MasterTemplate.MasterViewInfo);
                row.Cells["ID"].Value = i;
                row.Cells["Title"].Value = "Title " + i;
                radGridView2.Rows.Add(row);
            }
            radGridView2.EndUpdate(true);

            radGridView2.Rows[0].IsCurrent = true;
            radGridView2.Rows[0].IsSelected= true;

- Once the application is started, hold down the shift key and click the third row in the grid 

Expected result: the first three rows are selected
Actual result: the last three rows are selected

WORKAROUND:
Use the BeginUpdate and EndUpdate methods of the TableElement, not the control:
radGridView2.TableElement.BeginUpdate();
//add rows
radGridView2.TableElement.EndUpdate(true);

Steps to reproduce:
1. Add a grid to a form 
2. Add a self-reference hierarchy data and relation
3. Group the data on a column
Enter edit mode for a cell and directly click on the expand/collapse sign of a hierarchy row.
You will see that RadGridView does not behave correctly all the time.

To reproduce:
- Set the column like this:
GridViewMaskBoxColumn col = new GridViewMaskBoxColumn();
col.Mask = "&&&&&&&&&&";
col.MaskType = MaskType.Standard;
col.FieldName = "Name";
col.TextMaskFormat = MaskFormat.IncludeLiterals;

- Type two words and press enter.

Workaround:
public class MyRadMaskedEditBoxEditor : RadMaskedEditBoxEditor
{
    public override object Value
    {
        get
        {
            if (this.MaskTextBox.Mask == "my mask")
            {
                return this.MaskTextBox.Value;
            }
            return base.Value;
        }
        set
        {
            base.Value = value;
        }
    }
}

Set AutoSizeRows and WrapText to true.
Start resizing the form.
You will see that the cell size is wrong.

To reproduce:
- Add grid to a form and populate it with data.
- Show and hide the the excel like filtering several times.

Workaround, use the following behavior:

 public class CustomDataRowBehavior : GridDataRowBehavior
    {
        protected override bool OnMouseDownRight(MouseEventArgs e)
        {
            if (this.IsInEditMode && !this.GridViewElement.EndEdit())
    

When canceling the CurrentRowChanging event and the changing row is the new row, then the click here to add new row text will not be visible anymore.

To reproduce: run the attached sample project.

Workaround: set the AutoSizeRows property to false before exporting and set it back to true after the export is completed. 

1. Create a new project with RadGridView
2. Bind a hierarchy with a large number of rows
3. Add two buttons and on button click call ExpandAll and CollapseAll methods
4. Run the project and click the first button