There should be annotations (comments) system built into the framework:
€¢something like Word where one can add to a word a note
€¢something like Excel with its comments bag
€¢something like Workflow Foundation where every shape has a popup bag

If you have two nested containers and a shape inside the inner container a wrong connector will be activated if you try to create connection (target) to the shape. This can be reproduced with the MVVM SDK example. Try to connect the "Polo" shape to the "Bugatti" shape. The auto connector of the "Bugatti" shape will not be activated when the endpoint of the connection is inside the shape. It will be activated only if you directly hover over the connector.

A small glitch appears when the pencil tool is used. The glitch is demonstrated in the attached image.

When you paste a big image (bigger than 1024px) it gets blurry

When you switch between two different positions and zoom levels leads to a wrong visualization of the diagram items.

Windows DPI is 125 % (you need to sign out from win 10 then sign in again in order to apply the setting successfully).

Diagram is hosted in RibbonWindow.

The diagram ruler does not show the ticks and labels on the left of the zero tick (label). The Position property of Diagram could (0,0) or (500, 0), (300, 0) etc...

Check the attached image for better illustration.

Workaround could be replacing the RibbonWindow with MS Window.

The AStar routing does not calculate the RouterInflation for shapes which are  located in collapsed ContainerShape.

This is reproducible when:
- Copy a shape and paste it in the diagram
- Drag and drop from the diagram toolbox

DragAndDrop from toolbox is not working if an external dll is located in the GAC and the DiagramToolBox is located there.

NavigationPane does not show all connection when the RadDiagram IsVirtualized

Loading the diagram via its Load() method adds additional "Copy of" to the GroupName property of the groups.

As a workaround, the property can be set locally for the time being.

Hundreds of Connections with ConnectionsBridges turned on in diagram. One on top of the others.

StackOverflowException between updating the Connections' Start/End points.

If the ActiveTool of a RadDiagram instance is changed from a PointerTool to PanTool while a shape is being resized, shape will still be resizable when the mouse gets close to the resize rectangles. 

WPF Demo export as HTML does not work with specific examples