diff --git a/DistFiles/Language Explorer/Configuration/Lexicon/browseDialogColumns.xml b/DistFiles/Language Explorer/Configuration/Lexicon/browseDialogColumns.xml
index b2f655a7ca..85441b0687 100644
--- a/DistFiles/Language Explorer/Configuration/Lexicon/browseDialogColumns.xml	
+++ b/DistFiles/Language Explorer/Configuration/Lexicon/browseDialogColumns.xml	
@@ -210,7 +210,7 @@
 		ghostListField="LexDb.AllExampleTranslationTargets"
 		field="CmTranslation.Type" bulkEdit="atomicFlatListItem" bulkDelete="false" list="LangProject.TranslationTags"/>
 	<column layout="StemNameForEntry" label="Stem Name" visibility="dialog"/>
-	<column layout="AllomorphStemNames" displayWs="best analysis" multipara="true" label="Allomorph Stem Names" sortmethod="MorphSortKey"
+	<column layout="AllomorphStemNames" displayWs="best analysis" multipara="true" label="Stem Name (Allomorph)" sortmethod="MorphSortKey"
 	 ghostListField="LexDb.AllPossibleAllomorphs" visibility="dialog"/>
 	<!-- removed as per LT-9899
 	<column layout="InflectionClassForEntry" label="Inflection Classes (Entry)" visibility="dialog"/>
diff --git a/Src/Common/Controls/DetailControls/DataTree.cs b/Src/Common/Controls/DetailControls/DataTree.cs
index f05bd108c1..9303b46973 100644
--- a/Src/Common/Controls/DetailControls/DataTree.cs
+++ b/Src/Common/Controls/DetailControls/DataTree.cs
@@ -553,8 +553,11 @@ public void PropChanged(int hvo, int tag, int ivMin, int cvIns, int cvDel)
 			//	return;
 			if (m_monitoredProps.Contains(Tuple.Create(hvo, tag)))
 			{
-				RefreshList(false);
-				OnFocusFirstPossibleSlice(null);
+				// If we call RefreshList now, it causes a crash in the invoker
+				// because some slice data structures that are being used by the invoker
+				// get disposed by RefreshList (LT-21980, LT-22011).  So we postpone calling
+				// RefreshList until the work is done.
+				this.BeginInvoke(new Action(PostponedRefreshList));
 			}
 			// Note, in LinguaLinks import we don't have an action handler when we hit this.
 			else if (m_cache.DomainDataByFlid.GetActionHandler() != null && m_cache.DomainDataByFlid.GetActionHandler().IsUndoOrRedoInProgress)
@@ -581,6 +584,15 @@ public void PropChanged(int hvo, int tag, int ivMin, int cvIns, int cvDel)
 			}
 		}
 
+		private void PostponedRefreshList()
+		{
+			if (!IsDisposed)
+			{
+				RefreshList(false);
+				OnFocusFirstPossibleSlice(null);
+			}
+		}
+
 		/// <summary></summary>
 		public Mediator Mediator
 		{
diff --git a/Src/Common/Controls/DetailControls/MSAReferenceComboBoxSlice.cs b/Src/Common/Controls/DetailControls/MSAReferenceComboBoxSlice.cs
index eefb2a0785..4c64cfc413 100644
--- a/Src/Common/Controls/DetailControls/MSAReferenceComboBoxSlice.cs
+++ b/Src/Common/Controls/DetailControls/MSAReferenceComboBoxSlice.cs
@@ -99,8 +99,6 @@ public override Mediator Mediator
 				m_MSAPopupTreeManager = new MSAPopupTreeManager(m_tree, m_cache, list,
 					m_tree.WritingSystemCode, true, m_mediator, m_propertyTable,
 					m_propertyTable.GetValue<Form>("window"));
-				m_MSAPopupTreeManager.BeforeChange += m_MSAPopupTreeManager_BeforeChange;
-				m_MSAPopupTreeManager.AfterChange += m_MSAPopupTreeManager_AfterChange;
 				m_MSAPopupTreeManager.AfterSelect += m_MSAPopupTreeManager_AfterSelect;
 				m_MSAPopupTreeManager.Sense = m_obj as ILexSense;
 				m_MSAPopupTreeManager.PersistenceProvider = m_persistProvider;
@@ -225,33 +223,6 @@ protected override void UpdateDisplayFromDatabase()
 			// What do we need to do here, if anything?
 		}
 
-		public void m_MSAPopupTreeManager_BeforeChange(object sender, TreeViewEventArgs e)
-		{
-			if (!ContainingDataTree.DoNotRefresh)
-			{
-				// Postpone refreshing the screen until m_MSAPopupTreeManager_AfterChange (LT-21980).
-				ContainingDataTree.DoNotRefresh = true;
-				m_forceRefresh = true;
-			}
-		}
-
-		public void m_MSAPopupTreeManager_AfterChange(object sender, TreeViewEventArgs e)
-		{
-			if (m_forceRefresh)
-			{
-				m_forceRefresh = false;
-				// We can't call RefreshDataTree directly,
-				// since that will cause Windows to crash accessing a disposed object.
-				// So, we queue it on the UI thread instead.
-				this.BeginInvoke(new Action(RefreshDataTree));
-			}
-		}
-
-		public void RefreshDataTree()
-		{
-			ContainingDataTree.DoNotRefresh = false;
-		}
-
 		private void m_MSAPopupTreeManager_AfterSelect(object sender, TreeViewEventArgs e)
 		{
 			// unless we get a mouse click or simulated mouse click (e.g. by ENTER or TAB),
diff --git a/Src/LexText/Interlinear/BIRDInterlinearImporter.cs b/Src/LexText/Interlinear/BIRDInterlinearImporter.cs
index b36b2b9956..9275ec6b99 100644
--- a/Src/LexText/Interlinear/BIRDInterlinearImporter.cs
+++ b/Src/LexText/Interlinear/BIRDInterlinearImporter.cs
@@ -728,6 +728,8 @@ private static IAnalysis CreateWordAnalysisStack(LcmCache cache, Word word)
 
 			foreach (var wordItem in word.Items)
 			{
+				if (wordItem.Value == null)
+					continue;
 				ITsString wordForm = null;
 				switch (wordItem.type)
 				{
@@ -758,7 +760,8 @@ private static IAnalysis CreateWordAnalysisStack(LcmCache cache, Word word)
 			}
 			else
 			{
-				Debug.Assert(analysis != null, "What else could this do?");
+				// There was an invalid analysis in the file. We can't do anything with it.
+				return null;
 			}
 
 			// Fill in morphemes, lex. entries, lex. gloss, and lex.gram.info
diff --git a/Src/LexText/Interlinear/ITextDllTests/BIRDFormatImportTests.cs b/Src/LexText/Interlinear/ITextDllTests/BIRDFormatImportTests.cs
index 7ffe441136..b361a988fb 100644
--- a/Src/LexText/Interlinear/ITextDllTests/BIRDFormatImportTests.cs
+++ b/Src/LexText/Interlinear/ITextDllTests/BIRDFormatImportTests.cs
@@ -449,6 +449,77 @@ public void UglyEmptyDataShouldNotCrash()
 			}
 		}
 
+		[Test]
+		public void EmptyTxtItemUnderWordShouldNotCrash()
+		{
+			// an interlinear text example xml string
+			const string xml =
+"<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
+"<document version=\"2\">" +
+"<interlinear-text guid=\"6a424526-aa64-4912-b8c7-9e5ae0ab4aae\">" +
+"<item type=\"title\" lang=\"en\">Test</item>" +
+"<paragraphs>" +
+"<paragraph guid=\"ccd62b33-c9f6-4e52-917f-00c67c3638c8\">" +
+"<phrases>" +
+"<phrase begin-time-offset=\"0\" end-time-offset=\"3750\" guid=\"b57a2665-402a-4ab1-af16-655c70df062f\">" +
+"<item lang=\"fr\" type=\"txt\">testing paragraph without words</item>" +
+"<words>" +
+"<word guid=\"093fe3c6-d467-4c28-a03e-d511b94185da\">" +
+"<item lang=\"fr\" type=\"txt\"/>" + // empty txt item
+"</word>" +
+"</words>" +
+"<item lang=\"en\" type=\"gls\">In the country of a Mongol king lived three sisters.</item>" +
+"</phrase>" +
+"<phrase guid=\"441c1171-78a1-481b-9732-b9c558948ce5\">" +
+"<item type=\"txt\" lang=\"fr\">This is a test.</item>" +
+"<item type=\"segnum\" lang=\"en\">1</item>" +
+"<words>" +
+"<word guid=\"d161bf25-b6df-418d-b9c1-a396ff3ec5b1\">" +
+"<item type=\"txt\" lang=\"fr\">This</item>" +
+"</word>" +
+"<word guid=\"ab9e81c7-3157-4011-a8a1-68eb1afc0be1\">" +
+"<item type=\"txt\" lang=\"fr\">is</item>" +
+"</word>" +
+"<word guid=\"0ef6172b-07c3-4c91-b0b2-afbebca5fca0\">" +
+"<item type=\"txt\" lang=\"fr\">a</item>" +
+"</word>" +
+"<word guid=\"48949d94-869c-45d5-9251-b68ce7d66cee\">" +
+"<item type=\"txt\" lang=\"fr\">test</item>" +
+"</word>" +
+"<word>" +
+"<item type=\"punct\" lang=\"fr\">.</item>" +
+"</word>" +
+"</words>" +
+"<item type=\"gls\" lang=\"en\"></item>" +
+"</phrase>" +
+"</phrases>" +
+"</paragraph>" +
+"</paragraphs>" +
+"<languages>" +
+"<language lang=\"en\" font=\"Charis SIL\" />" +
+"<language lang=\"fr\" font=\"Times New Roman\" vernacular=\"true\" />" +
+"</languages>" +
+"</interlinear-text>" +
+"</document>";
+
+			var li = new LinguaLinksImport(Cache, null, null);
+			LCModel.IText text = null;
+			using(var stream = new MemoryStream(Encoding.ASCII.GetBytes(xml.ToCharArray())))
+			{
+				// SUT - Verify that no crash occurs importing this data: see LT-22008
+				Assert.DoesNotThrow(()=> li.ImportInterlinear(new DummyProgressDlg(), stream, 0, ref text));
+				using(var firstEntry = Cache.LanguageProject.Texts.GetEnumerator())
+				{
+					firstEntry.MoveNext();
+					var imported = firstEntry.Current;
+					Assert.That(imported.ContentsOA.ParagraphsOS.Count, Is.EqualTo(1));
+					Assert.That(((IStTxtPara)imported.ContentsOA.ParagraphsOS[0]).SegmentsOS.Count, Is.EqualTo(2));
+					// Verify that the words with non-empty txt were imported
+					Assert.That(((IStTxtPara)imported.ContentsOA.ParagraphsOS[0]).SegmentsOS[1].AnalysesRS.Count, Is.EqualTo(5));
+				}
+			}
+		}
+
 		[Test]
 		public void TestImportMergeFlexTextWithSegnumItem()
 		{
diff --git a/Src/LexText/LexTextControls/LinkMSADlg.resx b/Src/LexText/LexTextControls/LinkMSADlg.resx
index 81e1f250fb..d6facc1471 100644
--- a/Src/LexText/LexTextControls/LinkMSADlg.resx
+++ b/Src/LexText/LexTextControls/LinkMSADlg.resx
@@ -195,7 +195,7 @@
 	<value>102, 32</value>
   </data>
   <data name="m_panel1.Size" type="System.Drawing.Size, System.Drawing">
-	<value>208, 20</value>
+	<value>300, 20</value>
   </data>
   <data name="&gt;&gt;m_panel1.Name" xml:space="preserve">
 	<value>m_panel1</value>
diff --git a/Src/LexText/LexTextControls/MSAPopupTreeManager.cs b/Src/LexText/LexTextControls/MSAPopupTreeManager.cs
index 4ed27add30..b294d55807 100644
--- a/Src/LexText/LexTextControls/MSAPopupTreeManager.cs
+++ b/Src/LexText/LexTextControls/MSAPopupTreeManager.cs
@@ -44,9 +44,6 @@ public class MSAPopupTreeManager : PopupTreeManager
 
 		#region Events
 
-		public event TreeViewEventHandler BeforeChange;
-		public event TreeViewEventHandler AfterChange;
-
 		#endregion Events
 
 		/// <summary>
@@ -422,19 +419,11 @@ private bool EditExistingMsa()
 					m_sense.MorphoSyntaxAnalysisRA.Hvo, true, m_sEditGramFunc);
 				if (dlg.ShowDialog(ParentForm) == DialogResult.OK)
 				{
-					if (BeforeChange != null)
-					{
-						BeforeChange(this, null);
-					}
 					Cache.DomainDataByFlid.BeginUndoTask(String.Format(LexTextControls.ksUndoSetX, FieldName),
 						String.Format(LexTextControls.ksRedoSetX, FieldName));
 					m_sense.SandboxMSA = dlg.SandboxMSA;
 					Cache.DomainDataByFlid.EndUndoTask();
 					LoadPopupTree(m_sense.MorphoSyntaxAnalysisRA.Hvo);
-					if (AfterChange != null)
-					{
-						AfterChange(this, null);
-					}
 					return true;
 				}
 			}
diff --git a/Src/UnicodeCharEditor/App.config b/Src/UnicodeCharEditor/App.config
new file mode 100644
index 0000000000..efb7290f1c
--- /dev/null
+++ b/Src/UnicodeCharEditor/App.config
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+	<runtime>
+		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+			<dependentAssembly>
+				<assemblyIdentity name="icu.net" publicKeyToken="416fdd914afa6b66" culture="neutral" />
+				<bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
+			</dependentAssembly>
+		</assemblyBinding>
+	</runtime>
+</configuration>