If you delay adding a RibbonView in a RibbonWindow, the RibbonView is placed on top of the window, hiding its TitleBar.

RibbonView: RadRibbonButton has inconsistent pressed/focused state

The styling in the controls vary when the mouse is down.
- RadRibbonButton gets a black border.
- RadRibbonSplitButton gets an dark orange border (when clicking the dropdown button)
- RadRibbonDropDownButton gets a grey line at the top

On mouse over
- RadRibbonButton and RadRibbonDropDownButton have a dark orange border with a white inner border
- RadRibbonSplitButton (dropdown button) does not get the white inner border

Reason for declination: 
Currently there is no way to unify the pressed state of these buttons because there is no Pressed state of RadSplitButton (the toggle and button parts has their own press visualization that comes from the default style of the corresponding buttons). 

If the height of the screen is smaller than needed the App_menu is clipped in the bottom. There are 5-10 px wrong in calculation

Expose properties to control the BackstageItem.Icon size

Make Buttons' Image properties of Object type.

Make the gallery resizable

Currently, Title and Description properties are typed to string and the control template uses TextBlock controls to display these properties, I think that only typing these properties to "object", showing them with  ContentPresenters and adding a pair of DataTemplate Dependency properties (TitleTemplate and DescriptionTemplate) would offer an extremely flexibility to this useful control.

Declined: If the users need to transfer object data to the ScreenTip they could use the Tag property(http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.tag%28v=vs.110%29.aspx)  and bind its value to an custom Implicit style targeting the ScreenTip. 

RibbonGroup collection can be populated only w/ buttons from the designer

When the DropDownButton in an ApplicationMenu is clicked, the DropDown area should not be closed (see MS Excel for reference).

Edited Style of the ScreenTip does not apply when the ScreenTip is set as attached property.
Also, when you create a CustomControl deriving from the ScreenTip control, its default style is not applied.

The RibbonTabStrip does not collapse when Application Button is Collaps as well as the RibbonTabs.
This works in RibbonBar.

Available in LIB version: 2014.3.1402

Currently only the Left Key activates the key tips.

Change the ApplicationButton ControlTemplate so that the button Width can be easily customized.

UPDATE: RibbonView ApplicationButtonStyle property  can be used to apply a style on the ApplicationButton. Use the style to apply a Width on the button.

The MinimizedPopup should be closed after clicking on a RibbonControl in the RibbonGroups

Add MouseOver Selection states in the RadRibbonTab control

Decline reason: RibbonView and its elements (including TabControl) are inspired by MS Office products. Since hovering over the selected TabItem in MS Word for example doesn't change its visual appearance it shouldn't in RibbonView as well.
If your project design still requires such appearance then we highly recommend that you edit the Control Template of the TabControl in Telerik.Windows.Controls.RibbonView assembly and add a MultiTrigger Condition (in WPF):
  <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="IsMouseOver" Value="True"/>
                    <Condition Property="IsSelected" Value="True"/>
                </MultiTrigger.Conditions>
...
</MultiTrigger>
or add a  <VisualState x:Name="SelectedMouseOver"> to CommonStates VisualStateGroup.

When RoutedCommand is used in RadRibbonBackasteItem the OriginalSource is wrong.

Allow RibbonWindow Minimize/Maximize/Close buttns to work in in-browser scenarios

Expose properties to control the HorizontalAlignment and VerticalAlignment of the footer content

System.InvalidOperationException is thrown in the VS designer in a view defining a RadRibbontab control.

When a style is applied on the QAT, changing its position opens its popup menu unexpectedly. The style doesn't have to be customized, the issue is reproducable with the default OfficeBlack style of the control.