diff --git a/Changelog.txt b/Changelog.txt
index d5c70901e..6d5559c22 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -80,7 +80,7 @@
    * Add "Clear" key to list of available shortcut keys - thx OmrSi
    * Refresh text in mpv when changing RTL mode
    * Improve detect of video info - thx Janjens
-   * Improve read of PNS format - thx Milenko
+   * Improve read of PNS format - thx Enzo
    * Improve split with ASSA tags - thx Leon
    * Improve drag'n'drop to list view with istm format - thx Zivko
    * Ignore text between {} when spell checking ASSA/SSA - thx Omair
@@ -104,7 +104,7 @@
    * Fix waveform multiple select crash - thx darbor87
    * Fix broken "Duplicate line" shortcut - thx Kelvets/OmrSi
    * Fix crash in reading .ismt - thx DarkHorse-APP2
-   * Fix for PAC italic w missing space - thx Milenko
+   * Fix for PAC italic w missing space - thx Enzo
    * Fix switched total labels in RTL mode w original subtitle - thx OmrSi
    * Rollback max #lines enforce (now hidden setting) - thx pandalamp 
    * Take first audio track when loading wave form - thx Tuan-P
@@ -227,7 +227,7 @@
    * Make bd sup edit work better with full frame images - thx peter-qgd
    * Point sync now also works on original subtitle - thx Rene
    * Keep Text box height when resizing - thx AbsenceJam/darnn
-   * Add "Slovenian" to language auto detect - thx Milenko
+   * Add "Slovenian" to language auto detect - thx Enzo
    * Update Tesseract 5 Alpha to "2021-05-06" - thx iGom
    * Add French letters in OCR char inspect - thx tormento
    * Handle Unicode control char in "Remove empty lines" - thx igenaya
@@ -236,7 +236,7 @@
    * Fix for reading bdsup position - thx akaicat
    * Fix a few crashes in translation engine - thx howblast/Laís
    * Fix mpv dll loading from a folder with e.g. cyrillic chars - thx Zoran
-   * Fix for EBU time code writing - thx milenko
+   * Fix for EBU time code writing - thx Enzo
    * Fix show (correct) EBU properties for current file - thx Emilien
    * Fix non-ASCII chars when enc 20269 is unavailable (Linux) - thx jason
    * Fix a crash in RTL when activating syntax coloring - thx OmrSi
@@ -256,7 +256,7 @@
    * Add internal store for ASSA styles - thx Leon/z3us
    * Add dark theme - thx OmrSi/dvjrickkraft/MuhammadiJK
    * Add copy-paste translate
-   * Add "Delete lines" to "Batch convert" - thx Milenko
+   * Add "Delete lines" to "Batch convert" - thx Enzo
    * Add two new sub formats - thx Matthew
    * Add new ttml/dfxp variant - thx Mikhail
    * Add shortcut "Set start and set end of previous" - thx Jeff
@@ -385,7 +385,7 @@
    * Add new sub format (rtf) - thx m0ck69
    * Add shortcuts for Tools menu items Split/Append/Join - thx z3us
    * Add shortcuts for "Merge line with same text/time-code" - thx Mike
-   * Add shortcuts "Set end and pause" + "Export to PAC" - thx Milenko
+   * Add shortcuts "Set end and pause" + "Export to PAC" - thx Enzo
    * Add shortcut for File - Compare
    * Add shortcut for "Ext sel lines to next sc - gap" - thx m0ck69/OmrSi
    * Add shortcuts for "move selected lines" - thx OmrSi
@@ -668,7 +668,7 @@
 * FIXED:
    * Fix color in Sami format - thx OhaengCha/Jamakmake
    * Fix Microsoft Translator API for non-English - thx Ed
-   * Fix time code in format .sif - thx Milenko
+   * Fix time code in format .sif - thx Enzo
    * Fix FCE short gap without time codes - thx OmrSi
    * Fix crash when opening translation only from blank - thx OmrSi
    * Fix wrong filename after teletext import - thx beeeeswax
@@ -740,7 +740,7 @@
    * Fix "Fix OCR errors" in "Fix common errors" via "Batch convert" - thx  JySzE
    * Fix issue with PAC reading - thx s3ncha
    * Fix possible crash when going from src view to list view
-   * Fix "Save selected lines as..." issues - thx Milenko
+   * Fix "Save selected lines as..." issues - thx Enzo
    * Fix OcrFixReplaceLst_User issues - thx Maitch/xylographe
    * Fix crash in cmd line FixCommonErrors - thx Rouzax
    * Fix crash when deleting last line in FCE - thx sir qrcz
@@ -809,7 +809,7 @@
    * Skip small/short images when importing vobsub from mkv - thx Maitch
    * Fix for reading mkv on Linux - thx JGoutin
    * Exclude html/ass tags in line lengths (Statistics) - thx AlexandreMT
-   * Fix PAC reading issues - thx Milenko
+   * Fix PAC reading issues - thx Enzo
    * Fix remove text for HI issue - thx teodargent
    * Fix time code for bluray sup in m2ts - thx Jack1789
    * Fix "Find next" in "Replace dialog" - thx Maiki0
@@ -832,7 +832,7 @@
    * Add new sub format - thx thehulk
    * Add "remove formatting" via command line - thx JySzE
    * Allow binary formats in compare
-   * Add download link to Slovenian spell check dictionary - thx Milenko
+   * Add download link to Slovenian spell check dictionary - thx Enzo
    * Add some support for remove spaces and 3 lines - thx James
 * IMPROVED:
    * Update Portuguese translation - thx moob
@@ -955,7 +955,7 @@
    * Add new subtitle formats
    * Add some image pre-processing for OCR
    * Add "DVD Studio Pro" file properties - thx Daniel
-   * Add ebu stl boxing - thx Milenko
+   * Add ebu stl boxing - thx Enzo
    * Add "Fix RTL" to batch convert - thx OmrSi/MosDos96/ghost
    * Add new shortcuts (mostly related to alignment)
 * IMPROVED:
@@ -1142,7 +1142,7 @@
    * Fix issue regarding "Binary image compare OCR ext. matches" - thx SimplyTheBOSS
    * Fix issue regarding "Bridge gaps"/selected line - thx btsix
    * Fix new-line char in "Replace -> Replace with" text box - thx Leon
-   * Fix missing char "î" for EBU STL - thx Milenko
+   * Fix missing char "î" for EBU STL - thx Enzo
    * Fix missing color tag for EBU STL - thx Tom
    * Fix for null terminated text from mkv - thx taxen/mkver
    * Fix focus after Alt+3/4 (previous/next) - thx Jamakmake
diff --git a/src/libse/LibSE.csproj b/src/libse/LibSE.csproj
index c3e997578..fe5fefa46 100644
--- a/src/libse/LibSE.csproj
+++ b/src/libse/LibSE.csproj
@@ -15,8 +15,8 @@
     <Authors>Nikolaj Olsson</Authors>
     <PackageIcon>Icon.png</PackageIcon>
     <RepositoryType>git</RepositoryType>
-    <PackageReleaseNotes>SE 3.6.0
-- faster bd sup writing
+    <PackageReleaseNotes>SE 3.6.4
+- fix bd sup palette issue
 - new subtitle formats</PackageReleaseNotes>
   </PropertyGroup>
 
diff --git a/src/ui/Forms/Main.cs b/src/ui/Forms/Main.cs
index b49361021..f99444deb 100644
--- a/src/ui/Forms/Main.cs
+++ b/src/ui/Forms/Main.cs
@@ -10740,6 +10740,7 @@ namespace Nikse.SubtitleEdit.Forms
 
                 FixSplitItalicTag(currentParagraph, newParagraph);
                 FixSplitFontTag(currentParagraph, newParagraph);
+                FixSplitBoxTag(currentParagraph, newParagraph);
                 SetSplitTime(splitSeconds, currentParagraph, newParagraph, oldText);
 
                 if (Configuration.Settings.General.AllowEditOfOriginalSubtitle && _subtitleOriginal != null && _subtitleOriginal.Paragraphs.Count > 0)
@@ -10927,6 +10928,7 @@ namespace Nikse.SubtitleEdit.Forms
                         _subtitleOriginal.Renumber();
                         FixSplitItalicTag(originalCurrent, originalNew);
                         FixSplitFontTag(originalCurrent, originalNew);
+                        FixSplitBoxTag(currentParagraph, newParagraph);
                     }
                 }
 
@@ -11004,6 +11006,47 @@ namespace Nikse.SubtitleEdit.Forms
             }
         }
 
+        private void FixSplitBoxTag(Paragraph currentParagraph, Paragraph nextParagraph)
+        {
+            if (currentParagraph == null || nextParagraph == null)
+            {
+                return;
+            }
+
+            var startIdx = currentParagraph.Text.LastIndexOf("<box>", StringComparison.OrdinalIgnoreCase);
+
+            string pre;
+            if (startIdx >= 0 &&
+                !currentParagraph.Text.Contains("</box>", StringComparison.OrdinalIgnoreCase) &&
+                nextParagraph.Text.Contains("</box>", StringComparison.OrdinalIgnoreCase))
+            {
+                var endIdx = currentParagraph.Text.IndexOf('>', startIdx);
+                if (endIdx >= 0)
+                {
+                    var fontTag = currentParagraph.Text.Substring(startIdx, endIdx - startIdx + 1);
+                    pre = string.Empty;
+                    if (currentParagraph.Text.StartsWith('{') && currentParagraph.Text.IndexOf('}') > 0)
+                    {
+                        var i = currentParagraph.Text.IndexOf('}');
+                        pre = currentParagraph.Text.Substring(0, i + 1);
+                        currentParagraph.Text = currentParagraph.Text.Remove(0, i + 1);
+                    }
+
+                    currentParagraph.Text = pre + currentParagraph.Text + "</box>";
+                    nextParagraph.Text = pre + fontTag + nextParagraph.Text;
+                }
+            }
+            else if (currentParagraph.Text.StartsWith("{\\", StringComparison.Ordinal))
+            {
+                var endIdx = currentParagraph.Text.IndexOf('}', 2);
+                if (endIdx > 2)
+                {
+                    pre = currentParagraph.Text.Substring(0, endIdx + 1);
+                    nextParagraph.Text = pre + nextParagraph.Text;
+                }
+            }
+        }
+
         private void FixSplitFontTag(Paragraph currentParagraph, Paragraph nextParagraph)
         {
             if (currentParagraph == null || nextParagraph == null)
@@ -11599,6 +11642,7 @@ namespace Nikse.SubtitleEdit.Forms
                                 original.Text = ChangeAllLinesTagsToSingleTag(original.Text, "i");
                                 original.Text = ChangeAllLinesTagsToSingleTag(original.Text, "b");
                                 original.Text = ChangeAllLinesTagsToSingleTag(original.Text, "u");
+                                original.Text = ChangeAllLinesTagsToSingleTag(original.Text, "box");
 
                                 if (string.IsNullOrWhiteSpace(old1))
                                 {
@@ -11659,6 +11703,7 @@ namespace Nikse.SubtitleEdit.Forms
                     currentParagraph.Text = ChangeAllLinesTagsToSingleTag(currentParagraph.Text, "i");
                     currentParagraph.Text = ChangeAllLinesTagsToSingleTag(currentParagraph.Text, "b");
                     currentParagraph.Text = ChangeAllLinesTagsToSingleTag(currentParagraph.Text, "u");
+                    currentParagraph.Text = ChangeAllLinesTagsToSingleTag(currentParagraph.Text, "box");
 
                     if (old1.Contains(Environment.NewLine) || old2.Contains(Environment.NewLine) ||
                         old1.Length > Configuration.Settings.General.SubtitleLineMaximumLength || old2.Length > Configuration.Settings.General.SubtitleLineMaximumLength)
@@ -20541,7 +20586,7 @@ namespace Nikse.SubtitleEdit.Forms
                     audioVisualizer.UseSmpteDropFrameTime();
                 }
             }
-            else 
+            else
             {
                 audioVisualizer.WavePeaks = null;
                 audioVisualizer.SetSpectrogram(null);
@@ -20555,7 +20600,7 @@ namespace Nikse.SubtitleEdit.Forms
                     try
                     {
                         process = AddWaveform.GetCommandLineProcess(fileName, -1, targetFile, Configuration.Settings.General.VlcWaveTranscodeSettings, out var encoderName);
-                        System.Threading.SynchronizationContext.Current.Post(TimeSpan.FromMilliseconds(25), () => ShowStatus("Generating waveform in background..."));                      
+                        System.Threading.SynchronizationContext.Current.Post(TimeSpan.FromMilliseconds(25), () => ShowStatus("Generating waveform in background..."));
                         var bw = new BackgroundWorker();
                         bw.DoWork += (sender, args) =>
                         {