I'm not sure of why it's not working when you have put the preheader text in the ESP - which ESP is it?

Does the preheader text have to be defined in the ESP? If you can get away with it being in the template, this is how I do mine (and I have no issues with this):

I add this code within the <style> tag, at the top of the email, and outside of any media query:
.invisible-preheader{
width:0px!important;
height:0px!important;
font-size:0px!important;
line-height:0px!important;
display:none!important;
color:#e8e8e8!important;
}

I then add the actual markup inside the table when starting to build the email:

<!-- START Invisible Preheader -->
<tr>
<td align="center" class="invisible-preheader" style="font-size:0px; width:0px; height:0px; display:none; color:#e8e8e8; line-height:0px;">
<span class="invisible-preheader" style="font-size:0px; width:0px; height:0px; display:none; color:#e8e8e8; line-height:0px;">
INVISIBLE PREHEADER TO GO HERE
</span>
</td>
</tr>
<!-- END Invisible Preheader -->

I've used this for over 6 years and never had an issue this way :)

On quickly skipping through your code, the first thing I would try is adding a pixel width within the style attribute, for example:

<table align="center" border="0" cellpadding="0" cellspacing="0"
width="336" style="max-width:336px; width:336px;" class="max-width">

From my experience, when I set both of these, the width is respected! Hope that helps :)

Is this in the Litmus test, or on a live test of Outlook 2007? I thought they worked - just tested again and the bulletpoint is working for me. I'm using this code:

<ul>
<li>list item</li>
<li>list item</li>
<li>list item</li>
</ul>

Hi Gerardo.

I usually fix this by making sure there's enough content in the preheader. I usually stick to a minimum 30 word policy on that - never had an issue :)

Do you have an example of how it's displaying / what the actual problem areas are?

Hi Kristian,

Are you able to post a screenshot somehow of what the issue looks like?

It sounds familiar to an issue I had recently with little gaps appearing. I found that adding the below line of code to the table directly surrounding the problem area fixed it.

border-spacing:0; mso-line-height-rule: exactly; mso-margin-bottom-alt:0; mso-margin-top-alt:0; mso-table-lspace:0pt; mso-table-rspace:0pt;