Appears to be broken since upgrade

Since upgrading this morning the plug-in now appears to be ‘broken’

I have changed my settings as the message requests, but am receiving the following error message:

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/******/public_html/wp-content/plugins/wordsocial/inc/OAuth.php:1713) in /home/******/public_html/wp-content/plugins/wordsocial/wso_admin.php on line 17

Although I can connect to Facebook and connect to my account there, I am unable to even select the Twitter tab, and this pulls up a secondary error message, as follows:

Warning: Cannot modify header information – headers already sent by (output started at /home/******/public_html/wp-content/plugins/wordsocial/inc/OAuth.php:1713) in /home/******/public_html/wp-includes/pluggable.php on line 897

Finally, in the right hand side widgets, I am receiving the following error message:

Warning: file_get_contents() [function.file-get-contents]: URL file-access is disabled in the server configuration in /home/******/public_html/wp-content/plugins/wordsocial/wso_admin.php on line 451