To reproduce:

 RadSpellChecker radSpellChecker1 = new RadSpellChecker(); 

        public Form1()
        { 
            InitializeComponent(); 
           
            RadTextBox radTextBox1 = new RadTextBox();
            radTextBox1.Location = new Point(10, 10);
            this.Controls.Add(radTextBox1); 
             this.radSpellChecker1.AutoSpellCheckControl = radTextBox1; 

        }

1. Enter some valid text.
2. Select the content and right click with the mouse in order to copy the text by using the default context menu. However, the menu does not show.

Note: if the control is not spellchecked, it shows default context menu associated with MS TextBox.

Workaround: display your own menu with copy/paste options when no misspelled words are available.

RadContextMenu menu = new RadContextMenu();

public TestSpellchecker()
{
    InitializeComponent();

    RadMenuItem copyItem = new RadMenuItem("Copy");
    copyItem.Click += copyItem_Click;
    menu.Items.Add(copyItem);

    RadMenuItem pasteItem = new RadMenuItem("Paste");
    pasteItem.Click += pasteItem_Click;
    menu.Items.Add(pasteItem);

    this.radTextBox1.TextBoxElement.TextBoxItem.TextBoxControl.MouseDown += TextBoxControl_MouseDown;
}

private void pasteItem_Click(object sender, EventArgs e)
{
    this.radTextBox1.Paste();
}

private void copyItem_Click(object sender, EventArgs e)
{
    this.radTextBox1.Copy();
}

static Regex wordParser = new Regex(@"[\p{L}\p{N}\p{M}]+(?:[-.'´_@][\p{L}|\p{N}|\p{M}]+)*", RegexOptions.Compiled);

private void TextBoxControl_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == System.Windows.Forms.MouseButtons.Right)
    { 
        TextBoxSpellChecker tbSpellChecker = this.radSpellChecker1.GetControlSpellChecker(typeof(RadTextBoxControl)) as TextBoxSpellChecker;  
        MatchCollection words = wordParser.Matches(this.radTextBox1.Text);
        bool containsError = false;
        foreach (Match word in words)
        {
            string text = word.Captures[0].Value;
            if (!tbSpellChecker.SpellChecker.CheckWordIsCorrect(text, System.Threading.Thread.CurrentThread.CurrentCulture))              
            {
                containsError = true;
                break;
            }
        }
        if (!containsError)
        {
            menu.Show(this.radTextBox1, new Point(0,0));
        }
    }
}

To reproduce:
 Create a Windows Forms project
- Add a RadDock.
- Add 1 DocumentWindow and 1 ToolWindow to the RadDock control.
- Add a RadTextBoxControl to the DocumentWindow. Give it a height that will allow you to easily scroll.
- Run the application and enter enough text into the text box to make the scrollbar appear.
- Scroll to the bottom of the textbox.
- Minimize the application.

Workaround:
public class MyScroller : TextBoxScroller
{
    public MyScroller(RadScrollBarElement scrollbar)
        : base(scrollbar)
    { }
    public override int Value
    {
        get
        {
            return base.Value;
        }
        set
        {
            if (value < this.MaxValue)
            {
                base.Value = value;
            }
            
        }
    }
}

Change it as follows:
 radTextBoxControl1.TextBoxElement.ViewElement.VScroller = new MyScroller(radTextBoxControl1.TextBoxElement.VScrollBar);

To reproduce:
- Set the mask like this:
radMaskedEditBox1.Mask = "N0";
radMaskedEditBox1.MaskType = MaskType.Numeric;

Set the value to "12345" move the caret to the first position and press '.'
Workaround:
void radMaskedEditBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == '.')
    {
        e.Handled = true;
    }
}

Please refer to the attached sample project.

Workaround: keep the text box invisible until the form is shown.

The following stack trace is only available:
<ErrorReport GeneratedDate="2015-10-07 14-10-25 435"><Exception><Type>ArgumentNullException</Type><Message>Value cannot be null. Parameter name: key</Message><Source>mscorlib</Source><TargetSite>Int32 FindEntry(TKey)</TargetSite><StackTrace> at System.Collections.Generic.Dictionary`2.FindEntry(TKey key) at Telerik.WinControls.RichTextBox.Proofing.WordDictionary.GetWordsByMetaphoneKey(String word) at Telerik.WinControls.RichTextBox.Proofing.DocumentSpellChecker.GetSuggestionsForDictionary(IWordDictionary dictionary, Dictionary`2 suggestions, String word) at Telerik.WinControls.RichTextBox.Proofing.DocumentSpellChecker.GetSuggestions(String word, CultureInfo culture) at Telerik.WinControls.UI.SpellCheckWordByWordForm.Initialize(String word, IControlSpellChecker spellCheckingManager) at Telerik.WinControls.UI.SpellCheckWordByWordForm.Telerik.WinControls.RichTextBox.UI.Extensibility.SpellChecking.ISpellCheckForm.Check(RadRichTextBox richTextBox, String word) at Manad.Plus.WindowsUI.Common.Controls.LocalInputBehaviour.ProcessRightMouseButtonDown(MouseEventArgs e) at Telerik.WinControls.RichTextBox.UI.InputBehavior.ProcessMouseDown(MouseEventArgs e) at Telerik.WinControls.RichTextBox.RadRichTextBox.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseDown(Message&amp; m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message&amp; m) at Telerik.WinControls.RadControl.WndProc(Message&amp; m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)</StackTrace><Data>System.Collections.ListDictionaryInternal</Data><IsTerminating>False</IsTerminating><ExceptionInnerLevel>0</ExceptionInnerLevel>

To reproduce:
this.radDateTimePicker1.DateTimePickerElement.TextBoxElement.MaskType = MaskType.FreeFormDateTime;
string format = "MM/dd/yyyy - ddd";

radDateTimePicker1.Format = DateTimePickerFormat.Custom;
radDateTimePicker1.CustomFormat = format;
- Start the application and click the last part

Workaround:
class MyFreeFormDateTimeProvider : FreeFormDateTimeProvider
{
    public MyFreeFormDateTimeProvider(string mask, CultureInfo culture, RadMaskedEditBoxElement owner)
        : base(mask, culture, owner)
    {
    }
    public override void SelectNextEditableItem()
    {
        if (this.SelectedItemIndex +1 == this.List.Count)
        {
            return;
        }
        base.SelectNextEditableItem();
    }
}

To reproduce:

Me.RadMaskedEditBox1.Mask = "c"
Me.RadMaskedEditBox1.MaskType = MaskType.Numeric
Me.RadMaskedEditBox1.Value = Nothing

 Try to enter "123". You will notice that after entering "1", the cursor is positioned after "$" instead of "1". Thus, the  entered value will be  "$231.00", instead the expected "$123.00"

Workaround: initialize the RadMaskedEditBox with Value= 0.

To reproduce:
- Set the AutoSelectNextPart property to true.
- Selelct the entire text and try to enter the date.

Workaround:
radTimePicker1.TimePickerElement.KeyDown += TimePickerElement_KeyDown;

void TimePickerElement_KeyDown(object sender, KeyEventArgs e)
{
    if (this.radTimePicker1.TimePickerElement.MaskedEditBox.TextBoxItem.Text.Trim('A', 'P', 'M', ' ') == this.radTimePicker1.TimePickerElement.MaskedEditBox.TextBoxItem.SelectedText.Trim('A', 'P', 'M', ' '))
    {
        ((MaskDateTimeProvider)radTimePicker1.TimePickerElement.MaskedEditBox.Provider).SelectFirstEditableItem();
        e.Handled = true;
    }
}

One should be able to move to the next/previous word with Ctrl + right/left

To reproduce:
- Try to set the  alignment:
radPopupEditor1.PopupEditorElement.PopupContainerForm.HorizontalPopupAlignment = HorizontalPopupAlignment.RightToRight;
radPopupEditor1.Popup.HorizontalPopupAlignment = HorizontalPopupAlignment.RightToRight;

- The property is reset when the popup is opened.

Workaround:
void radPopupEditor1_PopupOpening(object sender, CancelEventArgs e)
{
    RadPopupOpeningEventArgs args = e as RadPopupOpeningEventArgs;
    int width = radPopupContainer1.Width;

    args.CustomLocation = new Point(args.CustomLocation.X - width + radPopupEditor1.Width, args.CustomLocation.Y);
}

To reproduce:
- Change the culture of the RadDateTime picker to Russian.
- Change the month to August and select the month part when the drop down is closed.

Workaround:
radDateTimePicker1.Format = DateTimePickerFormat.Custom;
radDateTimePicker1.CustomFormat = "dd/MMM/yyyy";

Workaround: 
public Form1()
{
    InitializeComponent();
    this.radMaskedEditBox1.MaskedEditBoxElement.TextBoxItem.KeyPress += TextBoxItem_KeyPress;
}

private void TextBoxItem_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == '-')
    {
        this.radMaskedEditBox1.MaskedEditBoxElement.TextBoxItem.SelectionStart = this.radMaskedEditBox1.MaskedEditBoxElement.TextBoxItem.Text.Length;
    }
}

Workaround:
1) set the CurrencyNegativePattern to 1
Alternatively:
2) check if the the formatted text is surrounded with brackets and if yes set the value of the masked edit box to be negative

The RadTokenizedTextItem should reference the data items as well. 

To reproduce:
- Set the font for all dates.
- Zoom In and out.

Workaround:
Use the ZoomChanged event and change the font while one zooms as well.

To reproduce:
public Form1()
{
    InitializeComponent();

    this.radTextBox1.Text = "abcd";
    this.radTextBox2.Text = "abcd";
    this.radTextBoxControl1.Text = "abcd";
    this.radTextBoxControl2.Text = "abcd";

    this.radTextBox2.Multiline = true;
    this.radTextBoxControl2.Multiline = true;

    this.textBox1.Text= "abcd";
    this.textBox2.Text= "abcd";
    this.textBox2.Multiline = true;
}

Workaround: set the Multiline property to true in the Form.Load event.

Second workaround: this.radTextBox2.TextBoxElement.TextBoxItem.Margin = new Padding(-2, 0, 0, 0);

To reproduce: 
1. Add UserControl
2. Drag and drop RadPopupEditor and RadPopupContainer
3. Open the smart tag of RadPopupEditor and try to set the AssociatedControl property. You will see error message from attached image. 

Workaround: 
Set the AssociatedControl at run time. Here is the code snippet: 

For C#: 
public UserControl1()
{
    InitializeComponent();
    this.radPopupEditor1.AssociatedControl = this.radPopupContainer1;
}

For VB:
Public Class UserControl1
    Inherits UserControl
    Public Sub New()
        InitializeComponent()
        Me.RadPopupEditor1.AssociatedControl = Me.RadPopupContainer1
    End Sub
End Class

Workaround:
        RadPopupContainer1.BindingContext = New BindingContext()