To reproduce:
Create a RadRibbonForm
Add tab, groups and buttons
Add an ImageList and changed the buttons ImageKey
Minimized the ribbon
Click the tab

Workaround:
Use the image property of the button - 
buttonElement.Image = Image.FromFile(@"image.png");

If the ribbon is collapsed and the user clicks a command tab to show the ribbon, and then uses Alt-Tab or another non-mouse method to switch to another application, the ribbon menu is 'stuck' and shows above all other windows. 
Switching back to the ribbon application and clicking will hide the ribbon. Using the mouse to click to another application does not have the same issue.

Steps to reproduce:

1. Add a RadRibbonBar to a form
2. Set it to be in Backstage mode
3. Add several items in the Backstage menu
4. Set their text to contain the & sign and set UseMnemonics to true on each menu item

Run the project and press Alt you will see that the letters preceded by an & are not underscored.

RadRibbonBar, the back stage button in not exposed in style builder.

When RadGallery is collapsed there are missing scroll buttons arrow.
Also hover state of the gallery items is missing.

FIX. RadRibbonForm - theme is not applying correctly, when some changes are made to ribbon button while RadRibbonBar is collapsed.

Steps to reproduce:
1. Add button to some ribbon group.
2. Collapse the ribbon.
3. Disable this button.
4. Enable this button.
5. Expand the ribbon.

Workaround - subscribe to ExpandedStateChanged  event and reapply the theme. For example:

            this.radRibbonBar1.ExpandedStateChanged += new EventHandler(radRibbonBar1_ExpandedStateChanged);


        void radRibbonBar1_ExpandedStateChanged(object sender, EventArgs e)
        {
            this.radRibbonBar1.ElementTree.ApplyThemeToElementTree();
        }

You have a scenario where there is a maximized MDI child form in a RadRibbonForm. You try to close the maximized child form from the MDI box of RadRibbonBar, but instead of getting the form closed, you programmatically hide it, so that you can reuse it further. The moment you try to show that form again, it appears non-maximized which is not a correct behavior.

1. Create a new project with RadRibbonBar. 2. Set the ApplicationMenuStyle to BackstageView 3. Change the application theme to Office2010Blue when handling Form.Load event. 4. Run the project.

The Click event is fired for another element instead for the element where the MouseDown event is fired in RadRibbonBar.

To reproroduce:
- open the smart tag and uncheck the ShowBorder check box.
- save, close and reopen the form

WORKAROUND: set the property in code
radRibbonBarButtonGroup1.ShowBorder = false;

To reproduce:
- allow selection by setting ItemSelection = true
- set the SelectedItem to some of the elements
- set the SelectedItem to null -> the item remains selected

To reproduce:
  Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        For index = 1 To 10
            Dim Temp As New RadButtonElement
            Temp.Image = Image.FromFile("C:\Program Files (x86)\Telerik\RadControls for WinForms Q3 2012\Examples\QuickStart\Resources\1RibbonMenuNewMagenta.png")
            Temp.TextImageRelation = TextImageRelation.ImageAboveText
            Temp.ImageAlignment = ContentAlignment.MiddleCenter
            Temp.Text = "Test"
            RadRibbonBarGroup1.Items.Add(Temp)
        Next

        'workaround
        'RadRibbonBar1.RibbonBarElement.ElementTree.ApplyThemeToElement(RadRibbonBar1.RibbonBarElement)
    End Sub

1. Create a new project with RadRibbonForm.
2. Set the ApplicationMenuStyle to BackstageView.
3. Add two buttons inside the backstage view. The first one should change the theme to Windows 7 and the second one to TelerikMetro.
4. Run the project and observe how application button position changes when changing the theme.

If one sets any of the Office 2010 themes to a ribbon bar with radio buttons and runs the project the radio buttons would not work.

1. Create a new application with RadRibbonForm.
2. Set the ApplicationThemeName to TelerikMetro.
3. Run the application. You will see that the quick access toolbar is visible and there are not items in it.

1. Create a new RadRibbonForm and add some tabs.
2. Set the backstage view mode.
2. Run the application. The application icon will not be visible.

If you add a maximized child form with ControlBox = false or FormBorderStyle = None, the MDI control box of the RadRibbonBar in the MDIParent should not be visible.

Currently the Keytips in the Ribbonbar and cannot process some chars like "Ä", "Ü", "Ö" and "ß".

Add a RadRibbonForm, set AllowAero = false, save and close the form. Open it again and an exception will be thrown.

To Reproduce:
            this.AllowAero = false;
            this.radRibbonBar1.RibbonBarElement.RibbonCaption.MinimizeButton.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
            this.radRibbonBar1.RibbonBarElement.RibbonCaption.MaximizeButton.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;