Several major improvements: Memberlist page added (planned since about beta 2), page group support added for non-JS ACL editor (oops!), and attempting to view a page for which you lack read permissions will get you logged.
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{$lang_insert_image_title}</title>
<script language="javascript" type="text/javascript" src="../../tiny_mce_popup.js"></script>
<script language="javascript" type="text/javascript" src="../../utils/mctabs.js"></script>
<script language="javascript" type="text/javascript" src="../../utils/form_utils.js"></script>
<script language="javascript" type="text/javascript" src="../../utils/validate.js"></script>
<script language="javascript" type="text/javascript" src="jscripts/functions.js"></script>
<link href="css/advimage.css" rel="stylesheet" type="text/css" />
<base target="_self" />
</head>
<body id="advimage" onload="tinyMCEPopup.executeOnLoad('init();');" style="display: none">
<form onsubmit="insertAction();return false;" action="#">
<div class="tabs">
<ul>
<li id="general_tab" class="current"><span><a href="javascript:mcTabs.displayTab('general_tab','general_panel');" onmousedown="return false;">{$lang_advimage_tab_general}</a></span></li>
<li id="appearance_tab"><span><a href="javascript:mcTabs.displayTab('appearance_tab','appearance_panel');" onmousedown="return false;">{$lang_advimage_tab_appearance}</a></span></li>
<li id="advanced_tab"><span><a href="javascript:mcTabs.displayTab('advanced_tab','advanced_panel');" onmousedown="return false;">{$lang_advimage_tab_advanced}</a></span></li>
</ul>
</div>
<div class="panel_wrapper">
<div id="general_panel" class="panel current">
<fieldset>
<legend>{$lang_advimage_general}</legend>
<table class="properties">
<tr>
<td class="column1"><label id="srclabel" for="src">{$lang_insert_image_src}</label></td>
<td colspan="2"><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><input name="src" type="text" id="src" value="" onchange="showPreviewImage(this.value);" /></td>
<td id="srcbrowsercontainer"> </td>
</tr>
</table></td>
</tr>
<tr id="imagelistsrcrow">
<td class="column1"><label for="imagelistsrc">{$lang_image_list}</label></td>
<td colspan="2" id="imagelistsrccontainer"> </td>
</tr>
<tr>
<td class="column1"><label id="altlabel" for="alt">{$lang_insert_image_alt}</label></td>
<td colspan="2"><input id="alt" name="alt" type="text" value="" /></td>
</tr>
<tr>
<td class="column1"><label id="titlelabel" for="title">{$lang_advimage_title}</label></td>
<td colspan="2"><input id="title" name="title" type="text" value="" /></td>
</tr>
</table>
</fieldset>
<fieldset>
<legend>{$lang_advimage_preview}</legend>
<div id="prev"></div>
</fieldset>
</div>
<div id="appearance_panel" class="panel">
<fieldset>
<legend>{$lang_advimage_tab_appearance}</legend>
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td class="column1"><label id="alignlabel" for="align">{$lang_insert_image_align}</label></td>
<td><select id="align" name="align" onchange="changeAppearance();">
<option value="">{$lang_insert_image_align_default}</option>
<option value="baseline">{$lang_insert_image_align_baseline}</option>
<option value="top">{$lang_insert_image_align_top}</option>
<option value="middle">{$lang_insert_image_align_middle}</option>
<option value="bottom">{$lang_insert_image_align_bottom}</option>
<option value="texttop">{$lang_insert_image_align_texttop}</option>
<option value="absmiddle">{$lang_insert_image_align_absmiddle}</option>
<option value="absbottom">{$lang_insert_image_align_absbottom}</option>
<option value="left">{$lang_insert_image_align_left}</option>
<option value="right">{$lang_insert_image_align_right}</option>
</select>
</td>
<td rowspan="6" valign="top">
<div class="alignPreview">
<img id="alignSampleImg" src="images/sample.gif" alt="{$lang_advimage_example_img}" />
Lorem ipsum, Dolor sit amet, consectetuer adipiscing loreum ipsum edipiscing elit, sed diam
nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.Loreum ipsum
edipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam
erat volutpat.
</div>
</td>
</tr>
<tr>
<td class="column1"><label id="widthlabel" for="width">{$lang_insert_image_dimensions}</label></td>
<td nowrap="nowrap">
<input name="width" type="text" id="width" value="" size="5" maxlength="5" class="size" onchange="changeHeight();" /> x
<input name="height" type="text" id="height" value="" size="5" maxlength="5" class="size" onchange="changeWidth();" /> px
</td>
</tr>
<tr>
<td> </td>
<td><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="constrain" type="checkbox" name="constrain" class="checkbox" /></td>
<td><label id="constrainlabel" for="constrain">{$lang_advimage_constrain_proportions}</label></td>
</tr>
</table></td>
</tr>
<tr>
<td class="column1"><label id="vspacelabel" for="vspace">{$lang_insert_image_vspace}</label></td>
<td><input name="vspace" type="text" id="vspace" value="" size="3" maxlength="3" class="number" onchange="changeAppearance();updateStyle();" />
</td>
</tr>
<tr>
<td class="column1"><label id="hspacelabel" for="hspace">{$lang_insert_image_hspace}</label></td>
<td><input name="hspace" type="text" id="hspace" value="" size="3" maxlength="3" class="number" onchange="changeAppearance();updateStyle();" /></td>
</tr>
<tr>
<td class="column1"><label id="borderlabel" for="border">{$lang_insert_image_border}</label></td>
<td><input id="border" name="border" type="text" value="" size="3" maxlength="3" class="number" onchange="changeAppearance();updateStyle();" /></td>
</tr>
<tr>
<td><label id="classlabel" for="classlist">{$lang_class_name}</label></td>
<td colspan="2">
<select id="classlist" name="classlist">
<option value="" selected>{$lang_not_set}</option>
</select>
</td>
</tr>
<tr>
<td class="column1"><label id="stylelabel" for="style">{$lang_advimage_style}</label></td>
<td colspan="2"><input id="style" name="style" type="text" value="" onchange="styleUpdated();" /></td>
</tr>
<!-- <tr>
<td class="column1"><label id="classeslabel" for="classes">{$lang_advimage_classes}</label></td>
<td colspan="2"><input id="classes" name="classes" type="text" value="" onchange="selectByValue(this.form,'classlist',this.value,true);" /></td>
</tr> -->
</table>
</fieldset>
</div>
<div id="advanced_panel" class="panel">
<fieldset>
<legend>{$lang_advimage_swap_image}</legend>
<input type="checkbox" id="onmousemovecheck" name="onmousemovecheck" class="checkbox" onclick="changeMouseMove();" />
<label id="onmousemovechecklabel" for="onmousemovecheck">{$lang_advimage_alt_image}</label>
<table border="0" cellpadding="4" cellspacing="0" width="100%">
<tr>
<td class="column1"><label id="onmouseoversrclabel" for="onmouseoversrc">{$lang_advimage_mouseover}</label></td>
<td><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><input id="onmouseoversrc" name="onmouseoversrc" type="text" value="" /></td>
<td id="onmouseoversrccontainer"> </td>
</tr>
</table></td>
</tr>
<tr id="imagelistoverrow">
<td class="column1"><label for="imagelistover">{$lang_image_list}</label></td>
<td id="imagelistovercontainer"> </td>
</tr>
<tr>
<td class="column1"><label id="onmouseoutsrclabel" for="onmouseoutsrc">{$lang_advimage_mouseout}</label></td>
<td class="column2"><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><input id="onmouseoutsrc" name="onmouseoutsrc" type="text" value="" /></td>
<td id="onmouseoutsrccontainer"> </td>
</tr>
</table></td>
</tr>
<tr id="imagelistoutrow">
<td class="column1"><label for="imagelistout">{$lang_image_list}</label></td>
<td id="imagelistoutcontainer"> </td>
</tr>
</table>
</fieldset>
<fieldset>
<legend>{$lang_advimage_misc}</legend>
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td class="column1"><label id="idlabel" for="id">{$lang_advimage_id}</label></td>
<td><input id="id" name="id" type="text" value="" /></td>
</tr>
<tr>
<td class="column1"><label id="dirlabel" for="dir">{$lang_advimage_langdir}</label></td>
<td>
<select id="dir" name="dir" onchange="changeAppearance();">
<option value="">{$lang_not_set}</option>
<option value="ltr">{$lang_advimage_ltr}</option>
<option value="rtl">{$lang_advimage_rtl}</option>
</select>
</td>
</tr>
<tr>
<td class="column1"><label id="langlabel" for="lang">{$lang_advimage_langcode}</label></td>
<td>
<input id="lang" name="lang" type="text" value="" />
</td>
</tr>
<tr>
<td class="column1"><label id="usemaplabel" for="usemap">{$lang_advimage_image_map}</label></td>
<td>
<input id="usemap" name="usemap" type="text" value="" />
</td>
</tr>
<tr>
<td class="column1"><label id="longdesclabel" for="longdesc">{$lang_advimage_long_desc}</label></td>
<td><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><input id="longdesc" name="longdesc" type="text" value="" /></td>
<td id="longdesccontainer"> </td>
</tr>
</table></td>
</tr>
</table>
</fieldset>
</div>
</div>
<div class="mceActionPanel">
<div style="float: left">
<input type="button" id="insert" name="insert" value="{$lang_insert}" onclick="insertAction();" />
</div>
<div style="float: right">
<input type="button" id="cancel" name="cancel" value="{$lang_cancel}" onclick="cancelAction();" />
</div>
</div>
</form>
</body>
</html>