Clarify note about non-quarter-ellipse inner curves. <http://lists.w3.org/Archives/Public/www-style/2012Mar/0258.html>

Author: fantasai

css3-background/Overview.html

@@ -2816,9 +2816,9 @@ <h3 id=corner-shaping><span class=secno>5.2. </span>Corner Shaping</h3>
    adjoining borders are of different thicknesses the corner will show a
    smooth transition between the thicker and thinner borders.
 
-  <p class=note>Note that this means that if the outer curve extends past the
-   adjacent corner's padding edge, the inner curve may not be a full quarter
-   ellipse.
+  <p class=note>Note that this means that if the center of the outer curve is
+   past the opposite side's padding edge, the inner curve might not be a full
+   quarter ellipse.
 
   <p>All border styles (&lsquo;<code class=css>solid</code>&rsquo;,
    &lsquo;<code class=css>dotted</code>&rsquo;, &lsquo;<code

css3-background/Overview.src.html

@@ -1973,9 +1973,9 @@ <h3 id="corner-shaping">Corner Shaping</h3>
 when two adjoining borders are of different thicknesses the corner will
 show a smooth transition between the thicker and thinner borders.
 
-<p class="note">Note that this means that if the outer curve extends
-past the adjacent corner's padding edge, the inner curve may not be
-a full quarter ellipse.</p>
+<p class="note">Note that this means that if the center of the outer curve
+is past the opposite side's padding edge, the inner curve might not be a
+full quarter ellipse.</p>
 
 <p>All border styles (''solid'', ''dotted'',  ''inset'', etc.)
 follow the curve of the border.