1. Create an app using RadDocking. The 'First Look' demo of RadDock can be modified to reproduce the problem. 2. Modify one of the panes, replace the TextBlock control with a TextBox control. Bind the text of the TextBox control to a string property. 3. Add the string property to the .cs file and in the setter, Show a MessageBox. 4. Run app. Select tab with Textbox control and modify the value. 5. Now select the other tab. the messagebox will be displayed. Notice it can be dismissed via keyboard but not via mouse click. It cannot be moved via mouse either. 6. Select a window outside of the application and not select the message box. Notice Mouse input now works. MessageBox can be moved and dismissed via mouse.