Has there been any updates to the email editor?

I'm seeing some extra white space being added to the editable sections in my HTML email once I have made an edit in the WYSIWYG.  This didn't happen using the same template a few weeks ago, does anyone know if Marketo have updated anything?

Here's an snippet of my HTML:

                         <tr>

                            <td valign="top" style="padding-top:10px; padding-bottom:10px; padding-left:20px; padding-right:20px; " class="padright10">

                                <table align="right" width="100%" border="0" cellspacing="0" cellpadding="0">

                                <tr>

                                    <td valign="top" align="left" style="font-family:Arial, Helvetica, sans-serif; font-size:14px; line-height:17px; color:#333333; " class="mktEditable" id="para 1">

                                        Your content management system (CMS) is the foundation for your digital experience strategy. But many companies are stuck with legacy and proprietary platforms that just can't keep pace with the speed of digital marketing.

                                    </td>

                                </tr>

                                </table>

                            </td>

                        </tr>

Before:

After:

Thanks.