Repeatable Crash on 5.2: System.ArgumentNullException: Value cannot be null.

I got the following message when running a BWS: Unhandled exception: System.ArgumentNullException: Value cannot be null. I get it when I run a BWS on the English word 'see'.

2013-11-17 08:39:01.0081 1 Error OurApp Unhandled exception: System.ArgumentNullException: Value cannot be null.
Parameter name: description
 at Libronix.DigitalLibrary.Guides.Sections.ResourceLink.Create(ResourceMilestoneRange range, String resourceTitle, String description, Boolean isStarred)
 at Libronix.DigitalLibrary.Guides.Sections.DefinitionSection.<DoWork>b__16(<>f__AnonymousType9`3 x)
 at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
 at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
 at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
 at Libronix.Utility.EnumerableUtility.ToReadOnlyCollection[T](IEnumerable`1 seq)
 at Libronix.DigitalLibrary.Guides.Sections.DefinitionSection.<DoWork>d__43.MoveNext()
 at Libronix.Utility.Threading.AsyncWorkerTask`1.EnumMoveNext()
 at Libronix.Utility.Threading.AsyncWorkerTask`1.ContinueExecution(Object unused)
 at Libronix.Utility.Threading.AsyncAction.ContinueCallback(Object unused)
 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)

7282.Logos.log