To reproduce: follow the steps defined in the following help article: http://docs.telerik.com/devtools/winforms/gridview/hierarchical-grid/tutorial-binding-to-hierarchical-data
Then, add a nested template in the second level. After closing the GridViewTemplate Collection Editor, you will notice that the template is not saved.

http://screencast.com/t/7VDYiopuUHn

Workaround: setup the hierarchy programmatically :  http://docs.telerik.com/devtools/winforms/gridview/hierarchical-grid/binding-to-hierarchical-data-programmatically

To reproduce:

private void Form1_Load(object sender, EventArgs e)
{
    this.productsTableAdapter.Fill(this.nwindDataSet.Products);
    this.radGridView1.BestFitColumns(BestFitColumnMode.AllCells);
}

private void radGridView1_ViewCellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
{
    if (e.CellElement is GridGroupContentCellElement)
    {
        e.CellElement.TextWrap = true;
    }
    else
    {
        e.CellElement.ResetValue(LightVisualElement.TextWrapProperty, ValueResetFlags.Local);
    }
}

Workaround: set the AutoSizeColumnsMode property to GridViewAutoSizeColumnsMode.Fill and use the ViewCellFormatting event to wrap the text: 

private void radGridView1_ViewCellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
{
    if (e.CellElement is GridGroupContentCellElement)
    {
        e.CellElement.TextWrap = true;
    }
    else
    {
        e.CellElement.ResetValue(LightVisualElement.TextWrapProperty, ValueResetFlags.Local);
    }
}

Until the new functionality becomes available you can use the workaround solution in the attached project.

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. 

To reproduce: follow the steps illustrated in the attached gif file.

One should be able to set the maximum row height when the rows are auto sized and the visual styles are exported.
 

To reproduce: setup the hierarchy at design time: http://docs.telerik.com/devtools/winforms/gridview/hierarchical-grid/tutorial-binding-to-hierarchical-data

Please refer to the attached gif file illustrating the exact steps.

NOTE: when the "Object does not match target type" error message is displayed, some of the properties are missing, e.g. MaxLength.

Workaround: modify the columns' properties at run time.

Please refer to the attached project.

Workakround: call the BeginEdit method in the RadGridView.Click event.

To reproduce: make sure only the first row is selected then Shift select row 3.
DataTable dt = new DataTable();

dt.Columns.Add("Value", typeof(int));
dt.Columns.Add("Date", typeof(DateTime));
dt.Columns.Add("Description", typeof(string));

for (int index = 0; index < 15; index++)
{
    dt.Rows.Add(new object[] { index % 5, DateTime.Now.AddSeconds(10), "Index = " + index });
}

radGridView1.DataSource = dt;
radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
radGridView1.MultiSelect = true;

foreach (GridViewColumn col in this.radGridView1.Columns)
{
    ConditionalFormattingObject obj = new ConditionalFormattingObject("Value",
        ConditionTypes.Equal,
        col.Index.ToString(),
        "",
        true);
    obj.RowBackColor = Color.SkyBlue;
    obj.RowForeColor = Color.Red;
    obj.TextAlignment = ContentAlignment.MiddleRight;
    obj.ApplyOnSelectedRows = false;
    this.radGridView1.Columns[0].ConditionalFormattingObjectList.Add(obj);
}

Workaround: use the CellFormatting event to apply the desired formatting by using the API for overriding theme settings: 

http://docs.telerik.com/devtools/winforms/gridview/cells/formatting-cells
http://docs.telerik.com/devtools/winforms/telerik-presentation-framework/override-theme-settings-at-run-time

To reproduce:

private void Form1_Load(object sender, EventArgs e) 
{ 
    this.productsTableAdapter.Fill(this.nwindDataSet.Products);
    this.radGridView1.EnableFiltering = true;
    this.radGridView1.ShowHeaderCellButtons = true;
    this.radGridView1.ShowFilteringRow = false;

    this.radGridView1.Columns["UnitPrice"].FormatString = "{0:$#,###0.00;-$#,###0.00;$0.00}";
}

Workaround:  in order to format the cells, use the CellFormatting event. As to the filter popup, use the following approach:
 this.radGridView1.FilterPopupInitialized += radGridView1_FilterPopupInitialized;

private void radGridView1_FilterPopupInitialized(object sender, Telerik.WinControls.UI.FilterPopupInitializedEventArgs e)
{
    RadListFilterPopup popup = e.FilterPopup as RadListFilterPopup;
    if (popup != null)
    {
        popup.MenuTreeElement.TreeView.NodeFormatting -= TreeView_NodeFormatting;
        popup.MenuTreeElement.TreeView.NodeFormatting += TreeView_NodeFormatting;
    }
}

private void TreeView_NodeFormatting(object sender, TreeNodeFormattingEventArgs e)
{
    decimal price;
    if (decimal.TryParse(e.Node.Text, out price))
    {
        e.NodeElement.ContentElement.Text = string.Format("{0:$#,###0.00;-$#,###0.00;$0.00}", price);
    }
}

To reproduce:
private void radButton1_Click(object sender, EventArgs e)
{
    radGridView1.Rows[0].Cells[0].Value = false;
}

private void Form1_Load(object sender, EventArgs e)
{
    radGridView1.AllowSearchRow = true;
    radGridView1.TableElement.SearchHighlightColor = Color.Orange;
    radGridView1.AutoExpandGroups = true;

    DataTable dt = new DataTable();

    dt.Columns.Add("test", typeof(bool));

    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);
    dt.Rows.Add(true);

    radGridView1.DataSource = dt;

    ((Telerik.WinControls.UI.GridViewCheckBoxColumn) radGridView1.Columns[0]).EnableHeaderCheckBox = true;
    ((Telerik.WinControls.UI.GridViewCheckBoxColumn) radGridView1.Columns[0]).Width = radGridView1.Width - 50;

    radGridView1.TableElement.Update(Telerik.WinControls.UI.GridUINotifyAction.Reset); //force header checkbox to check

    radGridView1.TableElement.ScrollTo(15, 0);
}

Workaround:
private void radButton1_Click(object sender, EventArgs e)
{
    radGridView1.Rows[0].Cells[0].Value = false;
    radGridView1.TableElement.Update(Telerik.WinControls.UI.GridUINotifyAction.Reset); //force header checkbox to check
}

To reproduce :
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    public RadForm1()
    {
        InitializeComponent();
        radGridView1.DataSource = GetTable();
    }

    private void radButton1_Click(object sender, EventArgs e)
    {
        var exporter = new GridViewPdfExport(radGridView1);
        exporter.FileExtension = "pdf";
        exporter.ShowHeaderAndFooter = true;
        exporter.LeftFooter = GridViewPdfExport.DatePrintedString;
        exporter.FitToPageWidth = true;
        exporter.PageMargins = new Padding(20, 15, 10, 10);
        exporter.RunExport(@"C:\Users\dkaramfi\Desktop\test123.pdf", new PdfExportRenderer());

    }

    static DataTable GetTable()
    {

        DataTable table = new DataTable();
        table.Columns.Add("Dosage", typeof(int));
        table.Columns.Add("Drug", typeof(string));
        table.Columns.Add("Name", typeof(string));
        table.Columns.Add("Name1", typeof(string));
        table.Columns.Add("Name2", typeof(string));
        table.Columns.Add("Name3", typeof(string));
        table.Columns.Add("Name4", typeof(string));


        table.Rows.Add(50, "Enebrel", "Sam", "Sam1", "Sam2", "Sam4", "Sam4");
        table.Rows.Add(25, "Indocin", "David");
        table.Rows.Add(50, "Enebrel", "Sam");
        table.Rows.Add(10, "Hydralazine", "Christoff");
        table.Rows.Add(21, "Combivent", "Janet");
        table.Rows.Add(100, "Dilantin", "Melanie");
        return table;
    }
}

Workaround:
Leave the default margins.

To reproduce:

Sub New()
    InitializeComponent()

    ThemeResolutionService.ApplicationThemeName = "Breeze"

    Dim dt As New DataTable
    dt.Columns.Add("Id", GetType(Integer))
    dt.Columns.Add("ParentId", GetType(Integer))
    dt.Columns.Add("Name", GetType(String))

    For index = 1 To 5
        dt.Rows.Add(index, 0, "Parent" & index)
    Next
    Dim rand As New Random
    For index = 6 To 25
        dt.Rows.Add(index, rand.Next(1, 6), "Parent" & index)
    Next
    Me.RadGridView1.Relations.AddSelfReference(Me.RadGridView1.MasterTemplate, "Id", "ParentId")
    Me.RadGridView1.DataSource = dt
    Me.RadGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill

    Me.RadGridView1.AutoSizeRows = True
End Sub

To reproduce:
 private void Form1_Load(object sender, EventArgs e)
 { 
     this.productsTableAdapter.Fill(this.nwindDataSet.Products); 
     this.categoriesTableAdapter.Fill(this.nwindDataSet.Categories);

     this.radGridView1.DataSource = this.productsBindingSource;
     GridViewMultiComboBoxColumn col = new GridViewMultiComboBoxColumn();
     col.DataSource = this.categoriesBindingSource;
     col.MinWidth = 200;
     col.DisplayMember = "CategoryName";
     col.ValueMember = "CategoryID"; 
     this.radGridView1.Columns.Add(col);
     this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
     this.radGridView1.CellValueChanged += radGridView1_CellValueChanged;
 }

 private void radGridView1_CellValueChanged(object sender, GridViewCellEventArgs e)
 {
     RadMessageBox.Show("CellValueChanged. Value >> " + e.Value.ToString());
 }

To reproduce:

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.ProductsTableAdapter.Fill(Me.NwindDataSet.Products)
    Me.CategoriesTableAdapter.Fill(Me.NwindDataSet.Categories)

    RadGridView1.AutoGenerateHierarchy = True
    RadGridView1.DataSource = Me.NwindDataSet
    RadGridView1.DataMember = "Categories"

    Me.RadGridView1.MasterTemplate.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill
    Me.RadGridView1.MasterTemplate.Templates(0).AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill

    Me.RadGridView1.UseScrollbarsInHierarchy = True
End Sub

Private Sub RadGridView1_ViewCellFormatting(sender As Object, e As CellFormattingEventArgs) Handles RadGridView1.ViewCellFormatting
    If e.Row.HierarchyLevel > 0 Then
        e.CellElement.TableElement.RowHeaderColumnWidth = 100
    End If
End Sub

To reproduce:

private void Form1_Load(object sender, EventArgs e)
{ 
    this.suppliersTableAdapter.Fill(this.nwindDataSet.Suppliers); 
    this.productsTableAdapter.Fill(this.nwindDataSet.Products);

    radGridView1.DataSource = nwindDataSet.Suppliers;
    radGridView1.BestFitColumns(BestFitColumnMode.AllCells);
    GridViewTemplate template = CreateTemplate(this.productsBindingSource);
    template.DataSource = nwindDataSet.Products;
    radGridView1.MasterTemplate.Templates.Add(template);

    GridViewRelation relation = new GridViewRelation(radGridView1.MasterTemplate);
    relation.ChildTemplate = template;
    relation.RelationName = "SuppliersProducts";
    relation.ParentColumnNames.Add("SupplierID");
    relation.ChildColumnNames.Add("SupplierID");
    radGridView1.Relations.Add(relation);
}

private GridViewTemplate CreateTemplate(BindingSource source)
{
    GridViewTemplate template = new GridViewTemplate();
    template.Caption = "TaskTemplate";
    template.AllowAddNewRow = false;
    template.EnableFiltering = true;
    FilterDescriptor filter = new FilterDescriptor();
    filter.PropertyName = "ReorderLevel";
    filter.Operator = FilterOperator.IsNotEqualTo;
    filter.Value = 25;
    template.FilterDescriptors.Add(filter);
    template.ShowFilteringRow = false;   
    template.SortDescriptors.Expression = "ProductName ASC, UnitPrice ASC";
    template.DataSource = source;
    template.BestFitColumns(BestFitColumnMode.AllCells);

    return template;
}

Workaround: set the filter after the hierarchy setup:
private void Form1_Load(object sender, EventArgs e)
{ 
    this.suppliersTableAdapter.Fill(this.nwindDataSet.Suppliers); 
    this.productsTableAdapter.Fill(this.nwindDataSet.Products);

    radGridView1.DataSource = nwindDataSet.Suppliers;
    radGridView1.BestFitColumns(BestFitColumnMode.AllCells);
    GridViewTemplate template = CreateTemplate(this.productsBindingSource);
    template.DataSource = nwindDataSet.Products;
    radGridView1.MasterTemplate.Templates.Add(template);

    GridViewRelation relation = new GridViewRelation(radGridView1.MasterTemplate);
    relation.ChildTemplate = template;
    relation.RelationName = "SuppliersProducts";
    relation.ParentColumnNames.Add("SupplierID");
    relation.ChildColumnNames.Add("SupplierID");
    radGridView1.Relations.Add(relation);
    
    FilterDescriptor filter = new FilterDescriptor();
    filter.PropertyName = "ReorderLevel";
    filter.Operator = FilterOperator.IsNotEqualTo;
    filter.Value = 25; 
    template.FilterDescriptors.Add(filter);
}

private GridViewTemplate CreateTemplate(BindingSource source)
{
    GridViewTemplate template = new GridViewTemplate();
    template.Caption = "TaskTemplate";
    template.AllowAddNewRow = false;
    template.EnableFiltering = true;
  
    template.ShowFilteringRow = false;   
    template.SortDescriptors.Expression = "ProductName ASC, UnitPrice ASC";
    template.DataSource = source;
    template.BestFitColumns(BestFitColumnMode.AllCells);
    
   
    return template;
}

Please refer to the attached screenshot and sample video.

Workaround:
public class CustomGrid : RadGridView
{
    public override string ThemeClassName  
    { 
        get 
        { 
            return typeof(RadGridView).FullName;  
        }
    }

    protected override void OnKeyPress(KeyPressEventArgs e)
    {
        this.BeginEdit();
        if (this.GridViewElement.ActiveEditor is RadDropDownListEditor)
        {
            string symbol = e.KeyChar.ToString();
            RadDropDownListEditor editor = this.GridViewElement.ActiveEditor as RadDropDownListEditor;
            RadDropDownListEditorElement element = editor.EditorElement as RadDropDownListEditorElement;

            if ((element.AutoCompleteMode & AutoCompleteMode.Suggest) == AutoCompleteMode.Suggest)
            {
                element.EditableElementText += symbol;
                element.EditableElement.SelectionStart = 1;
                element.EditableElement.SelectionLength = 0;
            }
        }
        base.OnKeyPress(e);
    }
}

To reproduce:

private void Form1_Load(object sender, EventArgs e)
{
    this.productsTableAdapter.Fill(this.nwindDataSet.Products);
    this.categoriesTableAdapter.Fill(this.nwindDataSet.Categories);
    
    radGridView1.AllowSearchRow = true;
    radGridView1.DataSource = nwindDataSet.Categories;
    radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
    radGridView1.UseScrollbarsInHierarchy = true;

    GridViewTemplate template = new GridViewTemplate();
    template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
    template.DataSource = nwindDataSet.Products;
    radGridView1.MasterTemplate.Templates.Add(template);

    GridViewRelation relation = new GridViewRelation(radGridView1.MasterTemplate);
    relation.ChildTemplate = template;
    relation.RelationName = "CategoriesProducts";
    relation.ParentColumnNames.Add("CategoryID");
    relation.ChildColumnNames.Add("CategoryID");
    radGridView1.Relations.Add(relation); 
}

Workaround:
private void radGridView1_CurrentRowChanged(object sender, CurrentRowChangedEventArgs e)
{
    if (this.radGridView1.CurrentRow != null)
    {
        if (this.radGridView1.CurrentRow.HierarchyLevel > 0)
        {
            tableElement.ScrollToRow((GridViewHierarchyRowInfo)(this.radGridView1.CurrentRow).Parent);
             this.radGridView1.TableElement.EnsureRowVisible((GridViewHierarchyRowInfo)(this.radGridView1.CurrentRow).Parent);
            tableElement.ScrollToRow(this.radGridView1.CurrentRow);
            tableElement.EnsureRowVisible(this.radGridView1.CurrentRow);
        }
    }
}

To reproduce:
Search a specific text by focusing the search box programmatically and the using the SendKeys method:
private void radButton1_Click(object sender, EventArgs e)
{
    GridSearchCellElement searchCell = radGridView1.TableElement.GetCellElement(radGridView1.MasterView.TableSearchRow, null) as GridSearchCellElement;
    if (searchCell != null)
    {
        searchCell.SearchTextBox.Focus();
        searchCell.SearchTextBox.Text = string.Empty;
        SendKeys.Send("t");
        SendKeys.Send("e");
        SendKeys.Send("s");
        SendKeys.Send("t");
    }
}

Workaround: 
Repeat the search in the SearchProgressChanged event:

radGridView1.MasterView.TableSearchRow.SearchProgressChanged += TextationSearchProgressHandler;

protected void TextationSearchProgressHandler(object sender, SearchProgressChangedEventArgs e)
{
    if (e.SearchFinished && null != radGridView1.TableElement)
    {
        GridSearchCellElement searchCell = radGridView1.TableElement.GetCellElement(radGridView1.MasterView.TableSearchRow, null) as GridSearchCellElement;
        if (searchCell != null
             && searchCell.SearchTextBox.TextBoxItem.Text != e.SearchCriteria)
        {
            radGridView1.MasterView.TableSearchRow.Search(searchCell.SearchTextBox.TextBoxItem.Text);
        }
    }
}