edit

assets/lib/kindeditor/kindeditor-all-min.js

@@ -755,6 +755,7 @@ function _formatHtml(html, htmlTags, urlType, wellFormatted, indentChar) {
 	html = html.replace(/\u2003/g, ' ');
 	html = html.replace(/\u3000/g, ' ');
 	html = html.replace(/"/g, '');
+	html = html.replace(/, " helvetica=""(.*?)"="/g, '');
 	html = html.replace(/<[^>]+/g, function($0) {
 		return $0.replace(/\s+/g, ' ');
 	});