Spaminator problem

Whenever I try to post a comment on my site, I get the following error:

Warning: parse_url(http://): Unable to parse url in /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php on line 355

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 44

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 45

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 46

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 48

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 49

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 50

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 51

Warning: Cannot modify header information - headers already sent by (output started at /home2/mg39/public_html/wp-content/plugins/kittens-spaminator.php:355) in /home2/mg39/public_html/wp-comments-post.php on line 55

I have tried the suggested answer here but it doesn’t work at all.
And the funny thing is that, I’m running a test blog on my own computer (Mac OS X) and it has the same WP setup as my host. But it works on my computer but not on the host. Any ideas?