Hello!
I updated to VM3 yesterday, and the webshop is went to crazy. The template is slipped, the product name, the product image slipped. Is it template problem? Unfortunately template made with artisteer.
So you are using VM3.0.2 - on J2.5.x? Or did you also update to J3.x? If to J3 then you will need a new Joomla template anyway.
It could be a problem of template overrides (if you used them) or the fact that crapisteer templates don't use standard Joomla css so you may have to use Firebug to work it out.
But you don't give a url so everything is guesswork.