Out of the blue I am getting that error.  If I disable the ribbon it goes away, but as soon as I enable it I get the error.   Here is the entire stack trace.  Any ideas?

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Exception Source:      System.Drawing
Exception Type:        System.ArgumentException
Exception Message:     Parameter is not valid.
Exception Target Site: AddPath

---- Stack Trace ----
   System.Drawing.Drawing2D.GraphicsPath.AddPath(addingPath As GraphicsPath, connect As Boolean)
       QADB.EXE: N 240285
   Infragistics.Win.UltraWinToolbars.QatTopAreaUIElement.GetLeftCurvePath(rect As Rectangle, isBorderPath As Boolean)
       QADB.EXE: N 01018
   Infragistics.Win.UltraWinToolbars.QatTopAreaUIElement.GetCurvedRegion(rect As Rectangle, isApplicationMenuVisible As Boolean)
       QADB.EXE: N 00097
   Infragistics.Win.UltraWinToolbars.QatTopAreaUIElement.get_Region()
       QADB.EXE: N 00086
   Infragistics.Win.UIElement.DrawElement(defaultDrawParams As UIElementDrawParams&)
       QADB.EXE: N 00708
   Infragistics.Win.UIElement.DrawChildElements(drawParams As UIElementDrawParams&)
       QADB.EXE: N 00046
   Infragistics.Win.UIElement.DrawElement(defaultDrawParams As UIElementDrawParams&)
       QADB.EXE: N 01402
   Infragistics.Win.UIElement.DrawChildElements(drawParams As UIElementDrawParams&)
       QADB.EXE: N 00046
   Infragistics.Win.UIElement.DrawElement(defaultDrawParams As UIElementDrawParams&)
       QADB.EXE: N 01402
   Infragistics.Win.UIElement.DrawChildElements(drawParams As UIElementDrawParams&)
       QADB.EXE: N 00046
   Infragistics.Win.UIElement.DrawElement(defaultDrawParams As UIElementDrawParams&)
       QADB.EXE: N 01402
   Infragistics.Win.UIElement.DrawHelper(graphics As Graphics, invalidRectangle As Rectangle, doubleBuffer As Boolean, alphaBlendMode As AlphaBlendMode, clipText As Boolean, forceDrawAsFocused As Boolean, preventAlphaBlendGraphics As Boolean)
       QADB.EXE: N 00487
   Infragistics.Win.ControlUIElementBase.Draw(graphics As Graphics, invalidRectangle As Rectangle, doubleBuffer As Boolean, alphaBlendMode As AlphaBlendMode, elementSize As Size, preventAlphaBlendGraphics As Boolean)
       QADB.EXE: N 00374
   Infragistics.Win.ControlUIElementBase.Draw(graphics As Graphics, invalidRectangle As Rectangle, doubleBuffer As Boolean, alphaBlendMode As AlphaBlendMode)
       QADB.EXE: N 00077
   Infragistics.Win.UltraControlBase.OnPaint(pe As PaintEventArgs)
       QADB.EXE: N 00132
   Infragistics.Win.UltraWinToolbars.UltraToolbarsDockArea.OnPaint(pe As PaintEventArgs)
       QADB.EXE: N 00100
   System.Windows.Forms.Control.PaintWithErrorHandling(e As PaintEventArgs, layer As Int16, disposeEventArgs As Boolean)
       QADB.EXE: N 00153
   System.Windows.Forms.Control.OnPrint(e As PaintEventArgs)
       QADB.EXE: N 00095
   System.Windows.Forms.Control.WmPrintClient(m As Message&)
       QADB.EXE: N 00150
   System.Windows.Forms.Control.WndProc(m As Message&)
       QADB.EXE: N 00992
   System.Windows.Forms.ControlNativeWindow.OnMessage(m As Message&)
       QADB.EXE: N 00015
   System.Windows.Forms.ControlNativeWindow.WndProc(m As Message&)
       QADB.EXE: N 00048
   System.Windows.Forms.NativeWindow.Callback(hWnd As IntPtr, msg As Int32, wparam As IntPtr, lparam As IntPtr)
       QADB.EXE: N 00089