I have since I used your plugin too many items in my server logs, which are caused by the plugin. The plugin itself seems to run, but these messages in the log bother me much. Since there are a lot of messages and so analyzing the log makes the very difficult

[Fri Feb 13 20:00:12 2015] [warn] [client xxx.xxx.xx.xx] mod_fcgid: stderr: PHP Notice: Undefined variable: html in /var/www/vhosts/xxxxxx.com/httpdocs/plugins/content/fastsocialshare/fastsocialshare.php on line 207, referer:

These server logs are about PHP notice, this doesn't compromise the normal plugin working.
It has been addressed and fixed in the version 1.3 that you can download for free.