diff --git a/docs/chapters/polybezier/content.en-GB.md b/docs/chapters/polybezier/content.en-GB.md
index 1a79c52a..40f9f9db 100644
--- a/docs/chapters/polybezier/content.en-GB.md
+++ b/docs/chapters/polybezier/content.en-GB.md
@@ -47,7 +47,7 @@ Cubic curves are now better behaved when it comes to dragging control points aro
 Finally, we also want to make sure that moving the on-curve coordinates preserves the relative positions of the associated control points. With that, we get to the kind of curve control that you might be familiar with from applications like Photoshop, Inkscape, Blender, etc.
 
 <graphics-element title="Standard connected quadratic poly-Bézier" src="./poly.js" data-type="quadratic" data-link="conventional"></graphics-element>
-<graphics-element title="Standard connected cubic poly-Bézier" src="./poly.js" data-type="cubic"  data-link="conventional"></graphics-element>>
+<graphics-element title="Standard connected cubic poly-Bézier" src="./poly.js" data-type="cubic"  data-link="conventional"></graphics-element>
 
 Again, we see that cubic curves are now rather nice to work with, but quadratic curves have a new, very serious problem: we can move an on-curve point in such a way that we can't compute what needs to "happen next". Move the top point down, below the left and right points, for instance. There is no way to preserve correct control points without a kink at the bottom point. Quadratic curves: just not that good...
 
diff --git a/docs/index.html b/docs/index.html
index 4e5fdeb7..ca812916 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -4879,7 +4879,7 @@ for p = 1 to points.length-3 (inclusive):
 							<img width="275px" height="275px" src="images\chapters\polybezier\b810f02639a79cf7f8ae416d7185614d.png" />
 							<label>Standard connected cubic poly-Bézier</label>
 						</fallback-image></graphics-element
-					>>
+					>
 
 					<p>
 						Again, we see that cubic curves are now rather nice to work with, but quadratic curves have a new, very serious problem: we can move an
diff --git a/docs/ja-JP/index.html b/docs/ja-JP/index.html
index d31020e6..4cec0e1a 100644
--- a/docs/ja-JP/index.html
+++ b/docs/ja-JP/index.html
@@ -4714,7 +4714,7 @@ for p = 1 to points.length-3 (inclusive):
 							<img width="275px" height="275px" src="images\chapters\polybezier\b810f02639a79cf7f8ae416d7185614d.png" />
 							<label>Standard connected cubic poly-Bézier</label>
 						</fallback-image></graphics-element
-					>>
+					>
 
 					<p>
 						Again, we see that cubic curves are now rather nice to work with, but quadratic curves have a new, very serious problem: we can move an
diff --git a/docs/js/custom-element/graphics-element.css b/docs/js/custom-element/graphics-element.css
index 29255bdd..f2a7e272 100644
--- a/docs/js/custom-element/graphics-element.css
+++ b/docs/js/custom-element/graphics-element.css
@@ -37,6 +37,7 @@ graphics-element:not(:defined) fallback-image {
   display: block;
   text-align: center;
   padding: 0.5em;
+  margin:auto;
 }
 
 /*
diff --git a/docs/zh-CN/index.html b/docs/zh-CN/index.html
index 492f4a4d..d0d96d20 100644
--- a/docs/zh-CN/index.html
+++ b/docs/zh-CN/index.html
@@ -4686,7 +4686,7 @@ for p = 1 to points.length-3 (inclusive):
 							<img width="275px" height="275px" src="images\chapters\polybezier\b810f02639a79cf7f8ae416d7185614d.png" />
 							<label>Standard connected cubic poly-Bézier</label>
 						</fallback-image></graphics-element
-					>>
+					>
 
 					<p>
 						Again, we see that cubic curves are now rather nice to work with, but quadratic curves have a new, very serious problem: we can move an