log out issues

[Chadi]

I get various members that have issues with the forum logging them out. Now, unfortunately I do not have exact info from them, but most are using either IE6, IE7 or FF2. I have never had this problem personally myself and I'm using FF2 with Vista. The rest are likely using XP if not Vista.

When they attempt to post, they get the usual guest message:

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

How can I trace this problem, specifically by members if possible (backend logs)? I'm using 3.6.5

Due to my custom theme, there is no "remember me" option (stupid move on the designers part). Can someone kindly provide the default code?

My header template is this:

<div id="highslide-container"></div>
<div id="controlbar2" class="highslide-overlay controlbar2">
    <a href="javascript:void(0)" onclick="return hs.previous(this)" title="Previous (left arrow key)"></a>
    <a href="javascript:void(0)" onclick="return hs.next(this)" title="Next (right arrow key)"></a>
    <a href="javascript:void(0)" class="highslide-move" title="Click and drag to move"
        style="margin-left: 10px"></a>
    <a href="javascript:void(0)" onclick="hs.close(this)" title="Close"></a>
</div>
<!-- logo -->
<a name="top"></a>
<table border="0" width="$stylevar[outertablewidth]" cellpadding="0" cellspacing="0" align="center" class="header_bg">
<tr>
    <td align="$stylevar[left]" valign="top"><a href="$vboptions[forumhome].php$session[sessionurl_q]">
    <img src="$stylevar[titleimage]" border="0" alt="$vboptions[bbtitle]" /></a></td>
    <td align="$stylevar[right]">
        <div align="center">

        </div>
<!-- banners -->
        <img border="0" src="http://www.talkjesus.com/images/right-logo.gif" alt="Right Logo"/></td>
</tr>
<tr>
<td height="34" colspan="2">

<!-- nav buttons bar -->
<div align="center">
    <table  cellpadding="$stylevar[cellpadding]" cellspacing="0" border="0" width="100%">
    <tr align="center">
        <td class="nav_menu_control" style="width: 16px"><a href="http://www.talkjesus.com/index.php">
        <img src="http://www.talkjesus.com/images/home.gif" border="0" alt="Home"/></a></td>
        <if condition="$show['member']">
<td id="2" class="nav_menu_control" style="width: 79px"><a href="#1">Info</a> 
<script type="text/javascript"> vbmenu_register("2"); </script></td> 
        </if>
        <if condition="$show['registerbutton']">
            <td class="nav_menu_control" style="width: 79px"><a href="register.php$session[sessionurl_q]" rel="nofollow">$vbphrase[register]</a></td>
        </if>
<td id="1" class="nav_menu_control" style="width: 79px"><a href="#1">Navigation</a> 
<script type="text/javascript"> vbmenu_register("1"); </script></td>
        <if condition="$show['member']">
                <else />
                </if>
        <if condition="$show['popups']">        
            <if condition="$show['searchbuttons']">
                <if condition="$show['member']">
                <td class="nav_menu_control" style="width: 79px"><a href="search.php?$session[sessionurl]do=getnew" accesskey="2"><font color=yellow>$vbphrase[new_posts_nav]</a></color></td>
                <else />
                <td class="nav_menu_control" style="width: 79px"><a href="search.php?$session[sessionurl]do=getdaily" accesskey="2">$vbphrase[todays_posts]</a></td>
                </if>
                <td id="navbar_search" class="nav_menu_control" style="width: 79px"><a href="search.php$session[sessionurl_q]" accesskey="4" rel="nofollow">$vbphrase[search]</a> <if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("navbar_search"); </script></if></td>
            </if>
<td id="journalnavbar" class="nav_menu_control" style="width: 79px"><a href="#journalnavbar">$vbphrase[journals]</a> <script type="text/javascript"> vbmenu_register("journalnavbar"); </script></td>
            <if condition="$show['member']">
                <td id="usercptools" class="nav_menu_control" style="width: 79px"><a href="$show[nojs_link]#usercptools">
                My Account</a> <script type="text/javascript"> vbmenu_register("usercptools"); </script></td>        
            </if>
        <else />        
            <if condition="$show['searchbuttons']">
                <td class="nav_menu_control" style="width: 79px"><a href="search.php$session[sessionurl_q]" accesskey="4">$vbphrase[search]</a></td>
                <if condition="$show['member']">
                <td class="nav_menu_control" style="width: 79px"><a href="search.php?$session[sessionurl]do=getnew" accesskey="2">$vbphrase[new_posts_nav]</a></td>
                <else />
                <td class="nav_menu_control" style="width: 79px"><a href="search.php?$session[sessionurl]do=getdaily" accesskey="2">$vbphrase[todays_posts]</a></td>
                </if>
            </if>
            <td class="nav_menu_control" style="width: 79px"><a href="forumdisplay.php?$session[sessionurl]do=markread" rel="nofollow">$vbphrase[mark_forums_read]</a></td>
            <if condition="$show['member']">            
                <td class="nav_menu_control" style="width: 79px"><a href="#" onclick="window.open('misc.php?$session[sessionurl]do=buddylist&amp;focus=1','buddylist','statusbar=no,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=250,height=300'); return false;">$vbphrase[open_buddy_list]</a></td>            
            </if>
        </if>
        <if condition="$show['member']">
            <td class="nav_menu_control" style="width: 79px"><a href="login.php?$session[sessionurl]do=logout&amp;logouthash=$bbuserinfo[logouthash]" onclick="return log_out()">$vbphrase[log_out]</a></td>
        </if>
    </tr>
    </table>
</div>
<!-- / nav buttons bar -->
</td></tr>
</table>
<!-- /logo -->

<!-- content table -->
$spacer_open

$_phpinclude_output

<!--[if lt IE 7.]>
<script defer type="text/javascript" src="clientscript/pngfix.js"></script>
<![endif]-->

Any help is appreciated.

My forum is direct root as in talkjesus.com not talkjesus.com/forum