Warning: implode() [function.implode]: Invalid arguments passed in

I made a few changes to my product description, then when I went to view the preview it had this message at the top:
Warning: implode() [function.implode]: Invalid arguments passed in /home/freefoo/primary/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-functions.php on line 1185

See more at: https://www.freedomfootbags.com/shop/casual/mr-sandbag/?preview=true&preview_id=158&preview_nonce=ca2945c351#sthash.oCMACQsn.dpuf

I know next to nothing about any of this, but perhaps there is a quick fix. That part of the code reads:
if ( $query->is_tax == true )
new wpsc_products_by_category( $query );
return $query;