I get the following warnings after activating the plugin:
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'SlideshowWidget::registerWidget' was given in /wp-includes/plugin.php on line 403
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /wp-includes/plugin.php:403) in /plugins/thecartpress/TheCartPress.class.php on line 767
Warning: Cannot modify header information - headers already sent by (output started at wp-includes/plugin.php:403) in /plugins/post-views/post-views.php on line 114
Any help would be appreciated. Thanks!