If I set the AutoSize property to true for a RadWindow it will not leave space for any errors which are displayed in the Validation Summary (Client Side Validation) at the bottom of the window. To get around this I have hardcoded width and height properties for the window(s). Ideally we would like to go back to Auto Sizing the window. Does anyone know how to use AutoSize="true" and have the window resize dynamically to accomodate for a client-side validation summary?