diff --git a/CImg.h b/CImg.h
index 34559b5e..70f74342 100644
--- a/CImg.h
+++ b/CImg.h
@@ -24247,9 +24247,11 @@ namespace cimg_library {
       }
 
       static double mp_c2o(_cimg_math_parser& mp) {
-        mp_check_list(mp,"c2o");
         unsigned int ind = (unsigned int)mp.opcode[2];
-        if (ind!=~0U) ind = (unsigned int)cimg::mod((int)_mp_arg(2),mp.imglist.width());
+        if (ind!=~0U) {
+          mp_check_list(mp,"c2o");
+          ind = (unsigned int)cimg::mod((int)_mp_arg(2),mp.imglist.width());
+        }
         const CImg<T> &img = ind==~0U?mp.imgin:mp.imglist[ind];
         const int
           x = (int)_mp_arg(3),
@@ -25006,10 +25008,12 @@ namespace cimg_library {
       }
 
       static double mp_ellipse(_cimg_math_parser& mp) {
-        mp_check_list(mp,"ellipse");
         const unsigned int i_end = (unsigned int)mp.opcode[2];
         unsigned int ind = (unsigned int)mp.opcode[3];
-        if (ind!=~0U) ind = (unsigned int)cimg::mod((int)_mp_arg(3),mp.imglist.width());
+        if (ind!=~0U) {
+          mp_check_list(mp,"ellipse");
+          ind = (unsigned int)cimg::mod((int)_mp_arg(3),mp.imglist.width());
+        }
         CImg<T> &img = ind==~0U?mp.imgout:mp.imglist[ind];
         CImg<T> color(img._spectrum,1,1,1,0);
         bool is_invalid_arguments = false, is_outlined = false;
@@ -27173,9 +27177,11 @@ namespace cimg_library {
       }
 
       static double mp_o2c(_cimg_math_parser& mp) {
-        mp_check_list(mp,"o2c");
         unsigned int ind = (unsigned int)mp.opcode[2];
-        if (ind!=~0U) ind = (unsigned int)cimg::mod((int)_mp_arg(2),mp.imglist.width());
+        if (ind!=~0U) {
+          mp_check_list(mp,"o2c");
+          ind = (unsigned int)cimg::mod((int)_mp_arg(2),mp.imglist.width());
+        }
         const CImg<T> &img = ind==~0U?mp.imgin:mp.imglist[ind];
         longT offset = (longT)_mp_arg(3);
         double *ptrd = &_mp_arg(1) + 1;
diff --git a/html/header.html b/html/header.html
index 13cfce46..e5e2405b 100644
--- a/html/header.html
+++ b/html/header.html
@@ -23,7 +23,7 @@
     <div class="header">
       <a href="index.html"><img alt="Logo" src="img/logo_header.jpg" class="center_image" style="margin-top:1em;"/></a>
       <h2  style="padding-bottom: 1em">
-        Latest stable version: <b><a href="http://cimg.eu/files/CImg_.zip">3.3.2</a></b>
+        Latest stable version: <b><a href="http://cimg.eu/files/CImg_.zip">3.3.2</a></b> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Current pre-release: <b><a href="http://cimg.eu/files/CImg_latest.zip">3.3.3</a></b> (2023/11/24)
       </h2>
 
       <hr/>
diff --git a/html/header_doxygen.html b/html/header_doxygen.html
index 5d073f94..636cebaa 100644
--- a/html/header_doxygen.html
+++ b/html/header_doxygen.html
@@ -26,7 +26,7 @@
     <div class="header">
       <a href="../index.html"><img alt="Logo" src="../img/logo_header.jpg" class="center_image" style="margin-top:1em;"/></a>
       <h2  style="padding-bottom: 1em">
-        Latest stable version: <b><a href="http://cimg.eu/files/CImg_.zip">3.3.2</a></b>
+        Latest stable version: <b><a href="http://cimg.eu/files/CImg_.zip">3.3.2</a></b> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Current pre-release: <b><a href="http://cimg.eu/files/CImg_latest.zip">3.3.3</a></b> (2023/11/24)
       </h2>
 
       <hr/>