Upon activation of 2.x version, I get error in the admin panel:
"The plugin generated 3 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin."
Then if I leave the plugin activated, the admin panel is broken and I cannot write to the database anymore:
Warning: Cannot modify header information - headers already sent by (output started at /home/kenanoff/public_html/blog/wp-content/plugins/ultimate-facebook-comments-email-notify/ultimate-facebook-comments-email-notify.php:1) in /home/kenanoff/public_html/blog/wp-includes/pluggable.php on line 881
Deactivating the plugin brings everything back.