Added a new "hide-with-mce" CSS class in Dynano; all elements which have it will be hidden when TinyMCE is activated, and re-shown when it is destroyed.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{#advanced_dlg.image_title}</title>
<script type="text/javascript" src="../../tiny_mce_popup.js"></script>
<script type="text/javascript" src="../../utils/mctabs.js"></script>
<script type="text/javascript" src="../../utils/form_utils.js"></script>
<script type="text/javascript" src="js/image.js"></script>
</head>
<body id="image" style="display: none">
<form onsubmit="ImageDialog.update();return false;" action="#">
<div class="tabs">
<ul>
<li id="general_tab" class="current"><span><a href="javascript:mcTabs.displayTab('general_tab','general_panel');" onmousedown="return false;">{#advanced_dlg.image_title}</a></span></li>
</ul>
</div>
<div class="panel_wrapper">
<div id="general_panel" class="panel current">
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td class="nowrap"><label for="src">{#advanced_dlg.image_src}</label></td>
<td><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><input id="src" name="src" type="text" class="mceFocus" value="" style="width: 200px" onchange="ImageDialog.getImageData();" /></td>
<td id="srcbrowsercontainer"> </td>
</tr>
</table></td>
</tr>
<tr>
<td><label for="image_list">{#advanced_dlg.image_list}</label></td>
<td><select id="image_list" name="image_list" onchange="document.getElementById('src').value=this.options[this.selectedIndex].value;document.getElementById('alt').value=this.options[this.selectedIndex].text;"></select></td>
</tr>
<tr>
<td class="nowrap"><label for="alt">{#advanced_dlg.image_alt}</label></td>
<td><input id="alt" name="alt" type="text" value="" style="width: 200px" /></td>
</tr>
<tr>
<td class="nowrap"><label for="align">{#advanced_dlg.image_align}</label></td>
<td><select id="align" name="align" onchange="ImageDialog.updateStyle();">
<option value="">{#not_set}</option>
<option value="baseline">{#advanced_dlg.image_align_baseline}</option>
<option value="top">{#advanced_dlg.image_align_top}</option>
<option value="middle">{#advanced_dlg.image_align_middle}</option>
<option value="bottom">{#advanced_dlg.image_align_bottom}</option>
<option value="text-top">{#advanced_dlg.image_align_texttop}</option>
<option value="text-bottom">{#advanced_dlg.image_align_textbottom}</option>
<option value="left">{#advanced_dlg.image_align_left}</option>
<option value="right">{#advanced_dlg.image_align_right}</option>
</select></td>
</tr>
<tr>
<td class="nowrap"><label for="width">{#advanced_dlg.image_dimensions}</label></td>
<td><input id="width" name="width" type="text" value="" size="3" maxlength="5" />
x
<input id="height" name="height" type="text" value="" size="3" maxlength="5" /></td>
</tr>
<tr>
<td class="nowrap"><label for="border">{#advanced_dlg.image_border}</label></td>
<td><input id="border" name="border" type="text" value="" size="3" maxlength="3" onchange="ImageDialog.updateStyle();" /></td>
</tr>
<tr>
<td class="nowrap"><label for="vspace">{#advanced_dlg.image_vspace}</label></td>
<td><input id="vspace" name="vspace" type="text" value="" size="3" maxlength="3" onchange="ImageDialog.updateStyle();" /></td>
</tr>
<tr>
<td class="nowrap"><label for="hspace">{#advanced_dlg.image_hspace}</label></td>
<td><input id="hspace" name="hspace" type="text" value="" size="3" maxlength="3" onchange="ImageDialog.updateStyle();" /></td>
</tr>
</table>
</div>
</div>
<div class="mceActionPanel">
<div style="float: left">
<input type="submit" id="insert" name="insert" value="{#insert}" />
</div>
<div style="float: right">
<input type="button" id="cancel" name="cancel" value="{#cancel}" onclick="tinyMCEPopup.close();" />
</div>
</div>
</form>
</body>
</html>