Crash: Value cannot be null at Libronix.Utility.Windows.BitmapSourceUtility.s(BitmapSource bitmap)

I had a crash in 5.1b SR-2. I'd been using Logos, and been notified on an update. I clicked the link in the yellow bar to restart, and it crashed whilst trying to generate the layout thumbnail. I didn't have logging turned on, so this extract from the crash log is as good as you're going to get, I'm sorry.

*** Application Crash ***
Program Version: 5.1b SR-2 (5.1.2.0083)
Windows Version: 6.2.9200.0
Time: 2013-10-14 23:20:40 +01:00 (2013-10-14T22:20:40Z)
Installed memory: 16,341 MB
Install path: C:\Logos Program (for Videos)\Logos5\System\Logos.exe
Free install space: 97,564 MB
Data path: C:\Logos Program (for Videos)\Logos5\Data\o403u5bl.doq
Free disk space: 97,564 MB
Temp path: C:\Users\Logos Videos\AppData\Local\Temp\
Free temp space: 97,564 MB

Error ID: 9878
Error detail: ArgumentNullException: Value cannot be null.
Parameter name: bitmap

System.ArgumentNullException: Value cannot be null.
Parameter name: bitmap
 at Libronix.Utility.Windows.BitmapSourceUtility.s(BitmapSource bitmap)
 at LDLS4.LayoutUtility.SaveCurrentLayoutAsAppClosedLayout(AppModel app)
 at LDLS4.OurApp.AppModel_Exiting(Object sender, EventArgs e)
 at System.EventHandler.Invoke(Object sender, EventArgs e)
 at Libronix.Utility.EventHandlerUtility.Raise(EventHandler eventHandler, Object sender)
 at LDLS4.AppModel.Exit()
 at LDLS4.MainWindow.<OnClosing>b__19()
 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
 at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
 at System.Windows.Threading.DispatcherOperation.InvokeImpl()
 at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
 at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
 at System.Windows.Threading.DispatcherOperation.Invoke()
 at System.Windows.Threading.Dispatcher.ProcessQueue()
 at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
 at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
 at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
 at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
 at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
 at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
 at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
 at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
 at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
 at System.Windows.Threading.Dispatcher.Run()
 at System.Windows.Application.RunDispatcher(Object ignore)
 at System.Windows.Application.RunInternal(Window window)
 at System.Windows.Application.Run(Window window)
 at LDLS4.OurApp.InitializeAndRun(ReadOnlyCollection`1 listArgs, SingleInstanceManager sim)
 at LDLS4.OurApp.Main(String[] astrArgs)

75632.LogosCrash.txt