After installing Windows 8.1 Preview Pro and new Remote Admin Tools, AD Administrative Center keeps crashing after search being initiated on first Overview screen. Other functions are not impaired. Event log as follows:

Faulting application name: dsac.exe, version: 6.3.9431.0, time stamp: 0x51bcdb03
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00007ffb7e6c4234
Faulting process id: 0x20e8
Faulting application start time: 0x01ce7722ff6d16e9
Faulting application path: C:\WINDOWS\system32\dsac.exe
Faulting module path: unknown
Report Id: 7a06d5fe-e317-11e2-be9d-ac162d055e06
Faulting package full name:
Faulting package-relative application ID:

and

Application: dsac.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
Stack:
   at Microsoft.Management.UI.NavigationService.UpdateSelectedItem(Microsoft.Management.UI.INavigationItem)
   at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
   at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Input.AccessKeyManager.ProcessKey(System.Collections.Generic.List`1<System.Windows.IInputElement>, System.String, Boolean, Boolean)
   at System.Windows.Input.AccessKeyManager.OnKeyDown(System.Windows.Input.KeyEventArgs)
   at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(System.Windows.Input.ProcessInputEventHandler, System.Windows.Input.ProcessInputEventArgs)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)
   at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawKeyboardActions, Int32, Boolean, Boolean, Int32)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(System.Windows.Interop.MSG ByRef, Boolean ByRef)
   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(System.Windows.Interop.MSG ByRef, System.Windows.Input.ModifierKeys)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at System.Windows.Threading.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority, System.Delegate, System.Object)
   at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(System.Windows.Interop.MSG ByRef, Boolean ByRef)
   at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.TranslateAndDispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at Microsoft.ActiveDirectory.UI.App.Start()
   at Microsoft.ActiveDirectory.UI.Startup.Main()