static/tinymce/plugins/lists/editor_plugin_src.js
function setCursorPositionToOriginalLi(li) {
				var list = ed.dom.getParent(li, 'ol,ul');
				if (list != null) {
					var lastLi = list.lastChild;
					// Removed this line since IE9 would report an DOM character error and placing the caret inside an empty LI is handled and should be handled by the selection logic
					//lastLi.appendChild(ed.getDoc().createElement(''));
					ed.selection.setCursorLocation(lastLi, 0);
				}
			}
function setCursorPositionToOriginalLi(li) {
				var list = ed.dom.getParent(li, 'ol,ul');
				if (list != null) {
					var lastLi = list.lastChild;
					// Removed this line since IE9 would report an DOM character error and placing the caret inside an empty LI is handled and should be handled by the selection logic
					//lastLi.appendChild(ed.getDoc().createElement(''));
					ed.selection.setCursorLocation(lastLi, 0);
				}
			}
fix the cursor position to ensure it is correct in IE