Ticket #6975: 6975.patch

_source/core/dtd.js

@@ -142 +142 @@
                  */
                 $tableContent : {caption:1,col:1,colgroup:1,tbody:1,td:1,tfoot:1,th:1,thead:1,tr:1},
 
+                /** List of elements that have optional close tag */
+                $optionalClose : CKEDITOR.env.ie && CKEDITOR.env.version < 8 ? { dd : 1, dt :1 } : {},
+
         html: U,
         head: T,
         style: N,

_source/core/htmlparser/fragment.js

@@ -193 +193 @@
                         if ( element.isUnknown && selfClosing )
                                 element.isEmpty = true;
 
-                        element.isOptionalClose = optionalClose;
+                        // Check for optional closed elements, e.g. browser quirks (#6975) and manually opened blocks.
+                        element.isOptionalClose = tagName in CKEDITOR.dtd.$optionalClose || optionalClose;
 
                         // This is a tag to be removed if empty, so do not add it immediately.
                         if ( CKEDITOR.dtd.$removeEmpty[ tagName ] )
@@ -246 +247 @@
                                         }
                                         // Establish new list root for orphan list items.
                                         else if ( tagName in CKEDITOR.dtd.$listItem && currentName != tagName )
+                                        {
                                                 parser.onTagOpen( tagName == 'li' ? 'ul' : 'dl', {}, 0, 1 );
+                                        }
                                         // We're inside a structural block like table and list, AND the incoming element
                                         // is not of the same type (e.g. <td>td1<td>td2</td>), we simply add this new one before it,
                                         // and most importantly, return back to here once this element is added,