To reproduce:
public class RadForm1
{
	private RadButtonElement btnHelp;

	private void RadForm1_Load(object sender, EventArgs e)
	{
		btnHelp = new RadImageButtonElement();
		btnHelp.AutoSize = true;
		btnHelp.ShowBorder = false;
		btnHelp.Image = My.Resources.Resources.help;
		btnHelp.DisplayStyle = DisplayStyle.Image;
		btnHelp.ButtonFillElement.Visibility = ElementVisibility.Hidden;
		btnHelp.ClickMode = ClickMode.Release;
		btnHelp.Click += btnHelp_Click;

		this.FormElement.TitleBar.SystemButtons.Children.Insert(0, btnHelp);
	}

	private void btnHelp_Click(object sender, EventArgs e)
	{
		Process.Start("http://www.telerik.com");
	}
	public RadForm1()
	{
		Load += RadForm1_Load;
	}

}

Workaround:
Use the Press ClikMode.

To reproduce:
- Add some toggle buttons with image to a ribbon bar.
- Toggle some of them and the disable all the buttons.
- You will notice that the fill is incorrect and the image is not gray.

Workaround:
- Changed the UseDefaultDiabledState property for the toggle button element.
- Set transparent fill for the disabled state of the fill primitive.

To reproduce:
1. Drag a RadButton from the ToolBox and drop it onto the form. 
2. Drag a TelerikMetroBlue theme from the ToolBox and drop it onto the form. 
3. Change the button's theme at design time. You will notice the strange border around the control.
Please refer to the attached gif file.

However, when you save the form and reopen it the button looks ok.

To reproduce: Create a form with RadButton and do some action on the Click event. Use the following Tool to click the button using the DoDefaultAction option http://msdn.microsoft.com/en-us/library/windows/desktop/dd318521(v=vs.85).aspx . You will notice that the click action will not be executed 

Workaround: public class MyButton : RadButton { protected override AccessibleObject CreateAccessibilityInstance() { return new MyAccessibilityInstance(this); } } public class MyAccessibilityInstance : RadButtonAccessibleObject { public MyAccessibilityInstance(Control owner) : base(owner) { } public override void DoDefaultAction() { ((RadButton)base.Owner).PerformClick(); } } 

To reproduce: Add a RadRadioButton to a form. Add a Button which opens a OpenFileDialog. Open the dialog and position it on top of the RadRadioButton so when you double click on a file the mouse cursor to be exactly over the RadRadioButton. Double click a file and you will see that the RadRadioButton is checked. This behavior can be changed by changing the ClickMode of the RadioButtonElement but setting it has no effect.

To reproduce:
- click a RadCheckBox with the right mouse button and you will notice the the state of the checkbox is changed.

Workaround:

public class LeftCheckBox : RadCheckBox
{
    protected override void OnMouseUp(MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            base.OnMouseUp(e);
        }
    }

    public override string ThemeClassName
    {
        get
        {
            return typeof(RadCheckBox).FullName;
        }
        set
        {
        }
    }
}

No matter what is the toggle state of the ToggleButton, when disable always shows as ToggleState.Off

When image is being inserted to the ActionButton in RadSplitButton the ArrowButton might get overlaped if the text of the ActionButton is very long.

Workaround is to subtract the width of the image from the width of the text manually.

int actionButtonWidth = radSplitButton1.DropDownButtonElement.ActionButton.Size.Width;
int imageWidth = 40; // Sample rate should be equal to the width of the image in pixels

int desiredTextWidth = actionButtonWidth - imageWidth;

radSplitButton1.DropDownButtonElement.ActionButton.TextElement.MaxSize = new Size(desiredTextWidth, 0);

radSplitButton1.DropDownButtonElement.ActionButton.TextWrap = true;

To reproduce, create a RadButton on a form with the below settings.  The image is any 32x32 image. 

this.radButton1.Font = new System.Drawing.Font("Segoe UI", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); 
this.radButton1.Image = global::TestPopup.Properties.Resources.Image32x32; 
this.radButton1.Location = new System.Drawing.Point(13, 13); 
this.radButton1.Size = new System.Drawing.Size(131, 44); 
this.radButton1.Text = "The Quick Brown Fox"; 
this.radButton1.TextAlignment = System.Drawing.ContentAlignment.MiddleLeft; 
this.radButton1.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText; 
this.radButton1.TextWrap = true;

With Office2010Blue RadRadioButton not render correctly its state in disabled state if programmatically change the Checked state, i.e. control remains visible unchecked

If the CheckBox is not checked and the box is disabled it is not possible to programmatically change the Checked state, i.e. control remains visible as unchecked until it is enabled. Tested with Office2010Blue Theme

Please, test with Office2012Light

To reproduce: RadButton button = new RadButton(); button.AutoSize = true; button.MaximumSize = new Size(74, 0); button.Text = "Define Horizontal Measurement"; Controls.Add(button); WORKAROUND: set the MaxSize property of the border primitive to the same value as the MaxSize of the control: button.ButtonElement.BorderElement.MaxSize = new Size(74, 0);

ToggleStateChanging args are not giving the old value of the button.

Setting RadDropDownButtonElement MinSize property does not make the RadDropDownButton control stretch to fit its element.

Currently, the issue can be avoided through adding the following three lines of code:
            this.radDropDownButton1.RootElement.StretchHorizontally = false;
            this.radDropDownButton1.RootElement.StretchVertically = false;
            this.radDropDownButton1.RootElement.SaveCurrentStretchModeAsDefault();

Steps to reproduce:
1. Add two check boxes to a form
2. Set the Checked property of one to true
3. Set their enable property to false
4. Set the theme to TelerikMetroBlue 

Run the project and you will see that both check boxes look the same - disabled and unchecked.

The same applies to Office2010Blue and RadRadioButton

Workaround it by enabling the checkboxes for a moment and then disabling them. 

1. Create new project and add 2 buttons
2. Disable the second button
3. On first button click, enable the second button
4. Set the second button to be AcceptButton
5. Run the project and click the first button

Steps to reproduce:
1. Create a form that is MDI Parent
2. Create a form that would be and MDI Child.
3. Add a RadSplitButton to the MDI Child form and set it's anchor to Bottom | Left.
4. Set the WindowState of the MDI Child to be Maximized.
5. In a Form.Load event handler of the MDI Parent add an MDI Child form.
Run the project and you will see that the RadSplitButton is in the wrong location.

Setting the Font property of RadButton will not change the font in all states of the control. Currently, the issue can be avoided through setting the Font property of the ButtonElement.

When a RadMenuButtonItem is in the menu dropdown, its Click event fires twice.