{Logo} doesn't show anymore in Joomla 2.5 VM 2.0.6.
Workaround to use image has another problem of using the wrong local path.
Product {attributes} do NOT display.

Hello. Make sure the logo file exists (In VirtueMart ->Shop configuration).
What exactly is your problem with wrong local path?
If you have problem with image paths (it is producing TCPDF ERROR: Unable to get image), try changing option in VM Invoice -> General Config ->Image Paths.
Do you have switched Show Product Attributes in Invoice Items Configuration? Does the ordered product have attributes? When you turn on Debug mode (VM Invoice -> General Config) and see result code, are attributes presented there?

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.

Hello. Do you know when logo stopped working?
If it is ok for you, can you send me admin login to your site to Diese E-Mail-Adresse ist gegen Spambots geschützt! Du musst JavaScript aktivieren, damit Du sie sehen kannst. ? I can check why logo is not working on place.

As for attributes question, it is answered in propriate thread, we are sorry we not noticed this problem.