To reproduce:
 radTimePicker1.Value = DateTime.Now.AddDays(10);
 radTimePicker1.TimePickerElement.MaskedEditBox.MaskType = Telerik.WinControls.UI.MaskType.FreeFormDateTime;

Workaround:

protected override void OnLoad(EventArgs e)
{
    base.OnLoad(e);
    radTimePicker1.Value = DateTime.Now.AddDays(10);

    var provider = radTimePicker1.TimePickerElement.MaskedEditBox.Provider as FreeFormDateTimeProvider;

    provider.MinDate = DateTime.MinValue;
    provider.MaxDate = DateTime.MaxValue;
}

Workaround: 

public RadForm1()
{
    InitializeComponent();

    this.radSpinEditor1.SpinElement.TextChanging += SpinElement_TextChanging;
    this.radSpinEditor1.TextChanged += radSpinEditor1_TextChanged;
}

private void SpinElement_TextChanging(object sender, Telerik.WinControls.TextChangingEventArgs e)
{
    int numericValue = 0;
    if (!int.TryParse(e.NewValue, out numericValue))
    {
        this.radSpinEditor1.Tag = e.OldValue;
        e.Cancel = false;
    }
}

private void radSpinEditor1_TextChanged(object sender, EventArgs e)
{
    if (this.radSpinEditor1.Tag != null)
    {
        this.radSpinEditor1.SpinElement.Text = this.radSpinEditor1.Tag.ToString(); 
        this.radSpinEditor1.Tag = null;
    }
}

To reproduce: run the attached sample project, open the popup and try to to scroll the grid with using the mouse wheel. You will notice that the popup is immediately closed.

Workaround: 
    Private Sub PopupClosing(sender As Object, args As Telerik.WinControls.UI.RadPopupClosingEventArgs)
        If args.CloseReason = Telerik.WinControls.UI.RadPopupCloseReason.Mouse Then
            args.Cancel = True
        End If
    End Sub

RadDataLayout.LayoutControl has Text property and it is not relevant to show RadMarkupEditor when changing the text.

Sample code to reproduce the case: 

            if (int.TryParse(txtCount.Text, out int count))
            {
                string textToSet=new string('A', count)+"END";
                txtSample.Text = textToSet;

                this.radTextBox1.MaxLength = textToSet.Length;
               
                this.Text = txtSample.Text.Length.ToString();
               
            }

This behavior can be observed in the Office2010 theme. In the following image, the button's width in RadCalculatorDropDown and RadSpinEditor is less by 1 px compared to the buttons in the other editor controls.

Use attached to reproduce.

Workaround:
Use date format that does not display the entire month name. 

The Free Form Date Time Parsing of a RadTimePicker is not able to recognize "hhmm" as an legit value (ex. 1030 for half pas ten).

This improvement could be nice, as it is a common way to write an time. It is working in Outlook Appointement Form.

to reproduce this bug :
add RadDateTimePicker and set culture to fa-IR
change the header navigation mode to zoom with : 
Me.radDateTimePicker1.DateTimePickerElement.Calendar.HeaderNavigationMode = HeaderNavigationMode.Zoom
popup the date time picker then georgian dates are displayed
i'll attach screenshots of what happening.

Workaround:
this.radSpinEditor1.CausesValidation = false;
((TextBox)this.radSpinEditor1.SpinElement.TextBoxItem.HostedControl).CausesValidation = false;

RadSpellChecker is also using MEF to load the default dictionary: https://docs.microsoft.com/en-us/dotnet/framework/mef/attributed-programming-model-overview-mef If MEF fails the dictionary will not load and the control will not spell check.

The suggestion must popup after every word.
There should be an option for positioning the drop down inside the textbox.

 

Windows TextBox - OSK perfect

Telerik RadTextBox - OSK perfect

Telerik RadTextBoxControl - OSK doesn't work

Telerik RadDropDownList - OSK doesn't work

Telerik AutoCompleteBox - OSK doesn't work

This should work for all controls that have text input.

Using UI for WinForms R3 2017 (version 2017.3.912)

Strange behavior while selecting text with the mouse, while TextAlign is set to Right and there is more text then visible.
To reproduce try selecting all the text in the control from the attached file (once to the left, once to the right).

If the ShowClear button is visible and RihtToLeft is true, it won't select to the left (while there is more text than visible).


RadTextBoxControl radTextBoxControl1 = new Telerik.WinControls.UI.RadTextBoxControl();

this.radTextBoxControl1.Location = new System.Drawing.Point(239, 186);
this.radTextBoxControl1.Name = "radTextBoxControl1";
this.radTextBoxControl1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.radTextBoxControl1.ShowClearButton = true;
this.radTextBoxControl1.Size = new System.Drawing.Size(64, 20);
this.radTextBoxControl1.TabIndex = 6;
this.radTextBoxControl1.Text = "123456789123456789";
this.radTextBoxControl1.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;

Use attached to reproduce.

Workaround: 
Use RadTextBox.

To reproduce: set  this.radMaskedEditBox1.MaskType = Telerik.WinControls.UI.MaskType.IP; and try to enter '300' for the first part of the IP address. A message pops up  explaining that the value is outside the valid range. This message can't be changed. It should allow localizing. In addition, a RadMessageBox should be shown as well.

To reproduce:
- Open the demo application.
- Open the PropertyGrid -> FirstLook example.
- Open the color dialog editor multiple times. 

 

We should also add padding to the RadTimePicker

Workaround: 
this.radSpinEditor1.SpinElement.Padding = new Padding(2, 0, 0, 0);
this.radTimePicker1.TimePickerElement.Padding = new Padding(2, 0, 0, 0);