When you have set the Windows task bar to auto-hide and you maximize an RadRibbonWindow, you are not allowed to visualize the task bar on top of the RadRibbonWindow.

Available in LIB version: 2015.1.2303

When the Taskbar is auto-hidden, if the RibbonWindow is maximized, the task bar cannot be displayed.

We have a RadRibbonWindow.
When it is run on Windows XP (or on Windows 7, "Windows Classic" theme) and the DPI settings are high (above 170 %), the standard window buttons (Minimize, Restore and Close) are not displayed properly (they are cut). Also there is too much space between them.

Title bar (including the Contextual tab header) goes over the Window (MinMaxClose) Buttons

Output error in VS:

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='Telerik.Windows.Controls.RadRibbonView', AncestorLevel='1''. BindingExpression:Path=IsHostedInRibbonWindow; DataItem=null; target element is 'WindowTitle' (Name='WindowTitle'); target property is 'NoTarget' (type 'Object')

When ribbon is placed on two monitors the minimized popup is misplaced.

The Title of the RadRibbonWindow is not diplayed unless there is a RadRibbonView in the window.

You can not click the ColorPicker when it is inside a RadRibbonSplitButton.

The BackstageItems are not rendered as expected when the RadRibbonView is hosted in apanel with flow direction set to right to left.

TreeView or DataGrid, or COmbobox is placed in a dropcontent of a RibbonDropDownButton. Item is selected programmatically before the dropdown is loaded. This leads to null reference exception.

Currently, when the users hover around the window's border, the resizing border is 1 pixel wide. Create the border wider (higher at top and bottom borders).
 
Workaround: Apply right margin to the content inside the window.

The title of the RadRibbonWindow can't be trimmed when resizing the window. Even the window's buttons are overlapped

ActivatePreview event does not fire when the  gallery is databound

Available in Q1 2015 Release.

RadRibbonDropDownButton DropDownIndicator isn't rotated when the DropDownButtonPosition is Right and the DropDownPlacement is Right

When the component is hosted in a RibbonWindow and its CollapseThresholdSize is modified, if the BackstageMenu is opened on start-up, the TitleBar of the RibbonView is misaligned. Instead of displaying in the RibbonWindow title bar, it initially displays underneath it. Once you close the Backstage, the title bar is moved in the Window's TitleBar.

When the Title property is set to "" the RibbonView displays the ApplicationName two times. If the Title is set to null via binding the control displays the ApplicationName three times.

The problem doesn't occur when the RadRibbonView is hosted in a vanilla Window.

Available in LIB version: 2016.2.516

This is reproducible only if the application that holds RadRibbonView is started on another machine and you are connected to it through Remote Desktop Connection. When the keytips are enabled and you click in the main machine, then click inside the remote desktop window, the keytips are displayed.