Yes, my logo is configured and it used to show up in an older version of your product. Debug mode displays NOTHING for where the {logo} should be.
Image relative to domain root does not work properly but absolute does. My joomla root is
domain/info. If an image is set to 'relative to domain' it is re-written with an extra 'info' before the path that I've specified.
I have product attributes and I have the switch for product attributes set to Yes. In version 2.08 of your product this would display some invalid strings for the product that would effect the rest of the invoice. In version 2.09, it seems like you've disabled product attributes from displaying altogether. I emailed detailed information of my template, my debug and my pdf file a few days ago to info@... but have yet to hear from your company on this issue. I am using a simple drop down list of custom fields for my products and want to display what options the user has chosen. With version 2.08 I noticed on text box inputs, I would get something that stated 'text input' in the pdf invoice as opposed to what the user actually entered.