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+<html>
+<!-- This testcase asserts that in all the tables below, all 500px of the  --
+  -- orange colspanning cell's specified width should go to its first      --
+  -- spanned column.  Its second spanned column receives none of the       --
+  -- 500px, and it only gets a small amount of width by taking half of the --
+  -- light-blue cell's preferred width.                                    --
+  --                                                                       --
+  -- This happens because the first column starts with nonzero pref-width, --
+  -- whereas the second and third columns have zero pref-width.  Hence,    --
+  -- the orange colspanning cell favors the first column over the second,  --
+  -- whereas the lightblue colspanning cell distributes its width equally  --
+  -- between the second and third columns.                                 -->
+<head><style>
+  tr        { height: 1em;  }
+  td.wide   { width: 500px; }
+
+  td.orange { background: orange;    }
+  td.purple { background: purple;    }
+  td.teal   { background: teal;      }
+  td.blue   { background: lightblue; }
+</style></head>
+<body>
+  <p>(x,x) labels indicate the column & row order of the orange cell.</p>
+
+  <br/>(0,0)
+  <table cellpadding="0" cellspacing="0">
+    <tr>
+      <td class="orange wide" colspan="2"></td>
+      <td class="purple"></td>
+    </td>
+    </tr><tr>
+      <td class="teal">x</td>
+      <td class="blue" colspan="2">y z</td>
+    </tr>
+  </table>
+
+  <br/>(0,1)
+  <table cellpadding="0" cellspacing="0">
+    <tr>
+      <td class="teal">x</td>
+      <td class="blue" colspan="2">y z</td>
+    </td>
+    </tr><tr>
+      <td class="orange wide" colspan="2"></td>
+      <td class="purple"></td>
+    </tr>
+  </table>
+
+  <br/>(1,0)
+  <table cellpadding="0" cellspacing="0">
+    <tr>
+      <td class="purple"></td>
+      <td class="orange wide" colspan="2"></td>
+    </td>
+    </tr><tr>
+      <td class="blue" colspan="2">y z</td>
+      <td class="teal">x</td>
+    </tr>
+  </table>
+
+  <br/>(1,1)
+  <table cellpadding="0" cellspacing="0">
+    <tr>
+      <td class="blue" colspan="2">y z</td>
+      <td class="teal">x</td>
+    </td>
+    </tr><tr>
+      <td class="purple"></td>
+      <td class="orange wide" colspan="2"></td>
+    </tr>
+  </table>
+</body>
+</html>