[Plugin: MarketPress – WordPress eCommerce] Fatal Error: Line 27

After installing v2.5.1 and upon activation the site went down and the following message appeared:

Fatal error: Call to a member function get() on a non-object in /home/content/m/a/p/mapmoms/html/wp-includes/query.php on line 27

After removing the wordpress-ecommerce plug-in we’re up.

http://wordpress.org/extend/plugins/wordpress-ecommerce/