Here’s an issue that comes straight from the installation. You have the same issue on your demo site. Try this link: http://demo.gavick.com/joomla16/nov2011 ... OfPageId30.
If you scroll all the way to the bottom and then click on “back to top” you will see how breadcrumbs get squeezed and gets hided under the menu.
In my case happens the same thing, except I don’t have breadcrumbs enabled. So when user clicks on “Be the first to comment!” in K2 article/item, the same issue occurs.
How can we fix this?