Problem with product layout

[EagleNait]

Hello, i recently migrated my website from joomla 2.5.28 to 3.4.1 (one click update) and updated a the same time VM from version 2.x to 3.0.9.
Everything works perfectly but for one problem. I have a layout issue whenever i go to a product the whole product description is fitted into the "addtocart-bar" div.
But my real problem there is that i have this dropdown box which should let me choose the size of the product i want to buy that is not clickable (and does not appear in the HTML)

note: the "addto-cart button", "quantity-controls" and 'quantity-box' work

Thanks in advance

[jenkinhill]

the whole product description is fitted into the "addtocart-bar" div

Are you using a J3/VM3 compatible template?
URL?