Fancy Drop down menus not working since WP upgrade

[Joybilee Farm]

My website url is http://www.fiberarts.ca/blog
I am running Genesis with the Vintage child theme.

My drop down menus come as a solid block rather than gracefully dropping down, since the WP upgrade. I am using Woocommerce, which also had several upgrades after the WP upgrade.

I tried deactivating all my plug-ins and reactivating one at a time. With woocommerce deactivated the drop downs work properly.

Is there a fix for this without deactivating woocommerce? I went with woocommerce because they were working toward integration with Genesis. This is my second try at putting in a website store. I'd rather not redo it.

Initially the menus worked with woocommerce enabled. It became a problem after the WP upgrade.

Thanks,
Chris