diff --git a/docs/installation.rst b/docs/installation.rst
index f4c01d2a5..3bfd22dd1 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -67,7 +67,7 @@ Problems after installation
 
 * On Windows, Python error::
 
-      ImportError: DLL load failed while importing _fitz
+      ImportError: DLL load failed while importing _extra
 
   This has been occasionally seen if `MSVCP140.dll` is missing, and appears
   to be caused by a bug in some versions (2015-2017) of `Microsoft Visual C++
@@ -114,6 +114,14 @@ Problems after installation
   This appears to be a problem in Jupyter labs; see:
   https://github.com/pymupdf/PyMuPDF/issues/3643#issuecomment-2210588778.
 
+* On Windows, Python error::
+    
+    ImportError: dynamic module does not define module export function (PyInit__extra)
+
+  This was reported 2025-03-26 in https://github.com/pymupdf/PyMuPDF/issues/4405.
+  
+  The fix appears to be to install the latest `VC_redist.x64.exe`.
+
 
 Notes
 ---------------------------------------------------------
diff --git a/src/__init__.py b/src/__init__.py
index ba2e9e7d9..fbcae3c44 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -1567,6 +1567,12 @@ def update(self,
             cross_out: draw diagonal lines, 'Redact' only.
             rotate: set rotation, 'FreeText' and some others.
         """
+        annot_obj = mupdf.pdf_annot_obj(self.this)
+        
+        if border_color:
+            is_rich_text = mupdf.pdf_dict_get(annot_obj, PDF_NAME("RC"))
+            if not is_rich_text:
+                raise ValueError("cannot set border_color if rich_text is False")
         Annot.update_timing_test()
         CheckParent(self)
         def color_string(cs, code):
@@ -10252,11 +10258,13 @@ def _pixmap_read_samples(pm, offset, n):
             for i in range(n):
                 ret.append(mupdf.fz_samples_get(pm, offset+i))
             return ret
-        sample0 = _pixmap_read_samples( pm, 0, n)
-        for offset in range( n, count, n):
-            sample = _pixmap_read_samples( pm, offset, n)
-            if sample != sample0:
-                return False
+        for offset in range( 0, count, n):
+            if offset == 0:
+                sample0 = _pixmap_read_samples( pm, 0, n)
+            else:
+                sample = _pixmap_read_samples( pm, offset, n)
+                if sample != sample0:
+                    return False
         return True
 
     @property
diff --git a/src/utils.py b/src/utils.py
index 1dfb9ded8..882aa05ff 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -106,7 +106,7 @@ def write_text(
 def show_pdf_page(
         page,
         rect,
-        src,
+        docsrc,
         pno=0,
         keep_proportion=True,
         overlay=True,
@@ -114,11 +114,11 @@ def show_pdf_page(
         rotate=0,
         clip=None,
         ) -> int:
-    """Show page number 'pno' of PDF 'src' in rectangle 'rect'.
+    """Show page number 'pno' of PDF 'docsrc' in rectangle 'rect'.
 
     Args:
         rect: (rect-like) where to place the source image
-        src: (document) source PDF
+        docsrc: (document) source PDF
         pno: (int) source page number
         keep_proportion: (bool) do not change width-height-ratio
         overlay: (bool) put in foreground
@@ -165,15 +165,15 @@ def calc_matrix(sr, tr, keep=True, rotate=0):
     pymupdf.CheckParent(page)
     doc = page.parent
 
-    if not doc.is_pdf or not src.is_pdf:
+    if not doc.is_pdf or not docsrc.is_pdf:
         raise ValueError("is no PDF")
 
     if rect.is_empty or rect.is_infinite:
         raise ValueError("rect must be finite and not empty")
 
     while pno < 0:  # support negative page numbers
-        pno += src.page_count
-    src_page = src[pno]  # load source page
+        pno += docsrc.page_count
+    src_page = docsrc[pno]  # load source page
     if src_page.get_contents() == []:
         raise ValueError("nothing to show - source page empty")
 
@@ -199,7 +199,7 @@ def calc_matrix(sr, tr, keep=True, rotate=0):
         i += 1
         _imgname = n + str(i)
 
-    isrc = src._graft_id  # used as key for graftmaps
+    isrc = docsrc._graft_id  # used as key for graftmaps
     if doc._graft_id == isrc:
         raise ValueError("source document must not equal target")
 
@@ -210,7 +210,7 @@ def calc_matrix(sr, tr, keep=True, rotate=0):
         doc.Graftmaps[isrc] = gmap
 
     # take note of generated xref for automatic reuse
-    pno_id = (isrc, pno)  # id of src[pno]
+    pno_id = (isrc, pno)  # id of docsrc[pno]
     xref = doc.ShownPages.get(pno_id, 0)
 
     if overlay:
diff --git a/tests/test_4466.pdf b/tests/test_4466.pdf
new file mode 100644
index 000000000..782c1bead
Binary files /dev/null and b/tests/test_4466.pdf differ
diff --git a/tests/test_annots.py b/tests/test_annots.py
index bac2d9c68..556c9112e 100644
--- a/tests/test_annots.py
+++ b/tests/test_annots.py
@@ -544,12 +544,25 @@ def test_4254():
     annot = page.add_freetext_annot(rect, "Test Annotation from minimal example")
     annot.set_border(width=1, dashes=(3, 3))
     annot.set_opacity(0.5)
+    try:
+        annot.set_colors(stroke=(1, 0, 0))
+    except ValueError as e:
+        assert 'cannot be used for FreeText annotations' in str(e), f'{e}'
+    else:
+        assert 0
     annot.update()
 
     rect = pymupdf.Rect(200, 200, 400, 400)
     annot2 = page.add_freetext_annot(rect, "Test Annotation from minimal example pt 2")
     annot2.set_border(width=1, dashes=(3, 3))
     annot2.set_opacity(0.5)
+    try:
+        annot2.set_colors(stroke=(1, 0, 0))
+    except ValueError as e:
+        assert 'cannot be used for FreeText annotations' in str(e), f'{e}'
+    else:
+        assert 0
+    annot.update()
     annot2.update()
 
     # stores top color for each pixmap
@@ -611,3 +624,66 @@ def test_richtext():
     annot.update(fill_color=gold, opacity=0.5, rotate=90)
     pix2 = page.get_pixmap()
     assert pix1.samples == pix2.samples
+
+
+def test_4447():
+    document = pymupdf.open()
+    
+    page = document.new_page()
+
+    text_color = (1, 0, 0)
+    fill_color = (0, 1, 0)
+    border_color = (0, 0, 1)
+
+    annot_rect = pymupdf.Rect(90.1, 486.73, 139.26, 499.46)
+
+    try:
+        annot = page.add_freetext_annot(
+            annot_rect,
+            "AETERM",
+            fontname="Arial",
+            fontsize=10,
+            text_color=text_color,
+            fill_color=fill_color,
+            border_color=border_color,
+            border_width=1,
+        )
+    except ValueError as e:
+        assert 'cannot set border_color if rich_text is False' in str(e), str(e)
+    else:
+        assert 0
+    
+    try:
+        annot = page.add_freetext_annot(
+                (30, 400, 100, 450),
+                "Two",
+                fontname="Arial",
+                fontsize=10,
+                text_color=text_color,
+                fill_color=fill_color,
+                border_color=border_color,
+                border_width=1,
+                )
+    except ValueError as e:
+        assert 'cannot set border_color if rich_text is False' in str(e), str(e)
+    else:
+        assert 0
+    
+    annot = page.add_freetext_annot(
+            (30, 500, 100, 550),
+            "Three",
+            fontname="Arial",
+            fontsize=10,
+            text_color=text_color,
+            border_width=1,
+            )
+    annot.update(text_color=text_color, fill_color=fill_color)
+    try:
+        annot.update(border_color=border_color)
+    except ValueError as e:
+        assert 'cannot set border_color if rich_text is False' in str(e), str(e)
+    else:
+        assert 0
+    
+    path_out = os.path.normpath(f'{__file__}/../../tests/test_4447.pdf')
+    document.save(path_out)
diff --git a/tests/test_general.py b/tests/test_general.py
index 62a634fe1..a3236d389 100644
--- a/tests/test_general.py
+++ b/tests/test_general.py
@@ -1685,3 +1685,12 @@ def test_4415():
         pixmap.save(path_out)
         rms = gentle_compare.pixmaps_rms(path_out_expected, path_out)
         assert rms == 0, f'{rms=}'
+
+def test_4466():
+    path = os.path.normpath(f'{__file__}/../../tests/test_4466.pdf')
+    with pymupdf.Document(path) as document:
+        for page in document:
+            print(f'{page=}', flush=1)
+            pixmap = page.get_pixmap(clip=(0, 0, 10, 10))
+            print(f'{pixmap.n=} {pixmap.size=} {pixmap.stride=} {pixmap.width=} {pixmap.height=} {pixmap.x=} {pixmap.y=}', flush=1)
+            pixmap.is_unicolor  # Used to crash.