I'm using http://themeforest.net/item/nevada-responsive-multipurpose-theme/3087951?sso?WT.ac=portfolio_item&WT.seg_1=portfolio_item&WT.z_author=UnitedThemes but I designed the theme with WP 2.0+ and never had a problem until about an hour ago until today's release.
I did find a "fix but it seems to have made it go from bad to worse. Nevada forum says:
To BillGray: Please do not agitate people here around. If you missed the steps above you have made at least a failure too so do not blame us here.
However here is the temporary fix until we have an official update ready at themeforest:
Exchange the theme functions.php with the one attached and delete the following file on the web server:
as stated here inside the change logs http://wordpress.org/extend/plugins/woocommerce/changelog/
Please use this login widget instead : http://wordpress.org/extend/plugins/sidebar-login/
Did all this and now NO SITE and new error http://www.essentialbodywisdom.com/
Fatal error: Call to undefined function get_option() in /home/essentia/public_html/wp-includes/functions.php on line 18