I’m having the same problem. Error log reads:
PHP Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /home/xyz/xyz.com/html/_word_press/wp-content/plugins/twitter-tools/twitteroauth.php on line 19, referer: http://www.xyz.com/_word_press/wp-admin/options-general.php?page=twitter-tools.php
