[am1971]

If the invoice logo is not showing in order email edit mail/orders/invoice.tpl like me because of using a shared ssl, the logo is not displayed as the image directory is pulled from https://..... doesn't show up at all so I simply changed the logo directory and pull it directly from my server

search for:
<td valign="top">
<img src="{$images_dir}/invoice_logo.gif" border="0" alt="{$settings.Company.company_name}" /></td>

Replace with:

<td valign="top">
<img src="http://www.yourwebsite.com/(your cs-cart directoty/skins/default_blue/mail/images/invoice_logo.gif" border="0" alt="{$settings.Company.company_name}" /></td>

Works for me

[rommy]

this doesn't work for me still