When the content of the editor is within a SPAN element, nested in a P, pasting data with P element inside it using the pasteHtml() method throws JavaScript errors and the SPAN element is broken by the nested P elements. Steps to reproduce: 1.Set editor's content with this content: <p><span>Some text</span></p> 2.Use the editor's pasteHtml() method to paste this HTML in the middle of the above text: <p>Second text</p> 3.The result HTML is this: <P><SPAN>Some</P> <P>Second text</P> <P> text</SPAN><SPAN></SPAN></P>