Problem with attributes after update

Hi,

I’m having a big problem with attributes. After update woocommerce won’t them display. I have only this warning:

Warning: uasort() [function.uasort]: The argument should be an array in /home/ir158690/public_html/sklep/wp-content/plugins/woocommerce/woocommerce-template.php on line 792

What should I do?

[Newest version of responsive theme]

http://ww.wp.xz.cn/extend/plugins/woocommerce/