Ticket #3665: 3665.patch

_source/core/htmlparser/fragment.js

@@ -116 +116 @@
                                         currentNode = savedCurrent;
                         }
 
-                        // Rtrim empty spaces on block end boundary. (#3585)
                         if ( element._.isBlockLike )
                         {
-
                                 var length = element.children.length,
                                         lastChild = element.children[ length - 1 ],
                                         text;
                                 if ( lastChild && lastChild.type == CKEDITOR.NODE_TEXT )
                                 {
-                                        if ( !( text = CKEDITOR.tools.rtrim( lastChild.value ) ) )
+                                        // 1. IE incorrectly report ' ' inside empty block,
+                                        // trim it here.
+                                        // 2. Rtrim empty spaces on block end boundary. (#3585)
+                                        if ( CKEDITOR.env.ie && length == 1 && lastChild.value == ' '
+                                                 || !( text = CKEDITOR.tools.rtrim( lastChild.value ) ) )
                                                 element.children.length = length -1;
                                         else
                                                 lastChild.value = text;