diff --git a/HISTORY.md b/HISTORY.md
index 3919df4d8..1186ff186 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,14 @@
 
 ## in development:
 
+## 10.1.5:
+* **Notable Fixes:**
+    * fixed broadcasting and sending messages with data
+
+### 2024-09-15
+* threads: fixed broadcasting with data
+* prepared v10.1.5 patch
+
 ## 10.1.4:
 * **Notable Fixes:**
     * fixed a dictionary lookup glitch for primitive block palettes
diff --git a/snap.html b/snap.html
index 9f348991d..1f4f7af78 100755
--- a/snap.html
+++ b/snap.html
@@ -17,10 +17,10 @@
         <script src="src/symbols.js?version=2024-09-13"></script>
         <script src="src/widgets.js?version=2024-07-24"></script>
         <script src="src/blocks.js?version=2024-10-11"></script>
-        <script src="src/threads.js?version=2024-10-13"></script>
+        <script src="src/threads.js?version=2024-10-15"></script>
         <script src="src/objects.js?version=2024-10-13"></script>
         <script src="src/scenes.js?version=2024-05-28"></script>
-        <script src="src/gui.js?version=2024-10-13"></script>
+        <script src="src/gui.js?version=2024-10-15"></script>
         <script src="src/paint.js?version=2023-05-24"></script>
         <script src="src/lists.js?version=2024-09-16"></script>
         <script src="src/byob.js?version=2024-10-10"></script>
diff --git a/src/gui.js b/src/gui.js
index 126aa6723..aee1efe91 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -87,11 +87,11 @@ BlockVisibilityDialogMorph, ThreadManager, isString, SnapExtensions, snapEquals
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2024-October-13';
+modules.gui = '2024-October-15';
 
 // Declarations
 
-var SnapVersion = '10.1.4';
+var SnapVersion = '10.1.5';
 
 var IDE_Morph;
 var ProjectDialogMorph;
diff --git a/src/threads.js b/src/threads.js
index 01d294567..b9e5c7ee3 100644
--- a/src/threads.js
+++ b/src/threads.js
@@ -65,7 +65,7 @@ StagePickerMorph, CustomBlockDefinition, CommentMorph*/
 
 /*jshint esversion: 11, bitwise: false, evil: true*/
 
-modules.threads = '2024-October-13';
+modules.threads = '2024-October-15';
 
 var ThreadManager;
 var Process;
@@ -1055,8 +1055,11 @@ Process.prototype.evaluateMultiSlot = function (multiSlot, argCount) {
                         }
                     }
                 }
-                if (inputs.length) {
-                    // format the inputs as 2D table
+                if (inputs.length &&
+                    !['%receive', '%send'].includes(multiSlot.elementSpec)
+                ) {
+                    // format the inputs as 2D table, unless it's a "built-in"
+                    // group, e.g. for broadcast, scene changes etc.
                     ans = new List(inputs);
                     inputs = this.reportNumbers(1, ans.length()).reshape(
                         new List([0, multiSlot.slotSpec.length])
diff --git a/sw.js b/sw.js
index 4d990f471..aa8e97888 100644
--- a/sw.js
+++ b/sw.js
@@ -1,6 +1,6 @@
 /*global self, caches*/
 /*jshint esversion: 6*/
-var snapVersion = '10.1.4',
+var snapVersion = '10.1.5',
     cacheName = `snap-pwa-${snapVersion}`,
     filesToCache = [
         'snap.html',