Argh, about 4 out of 10 blogs I comment when I use search strings like "remember my personal information" , "Comments links could be nofollow free." and other script unique string return that error after submitting the comment. All I get is a blank page after submitting the comment and then when I go to the page I've commented on there's no comment on there. I don't know if the comment went through to moderation or anything but they're not at all spammy - I even tried it with no URL in the name, etc... tried everything so it must be a wordpress problem. Why is this occuring? Here's an example: http://www.rescuemarketing.com/blog/wp-comments-post.php - I commented on that guy's blog and after submit got taken to that page.
Actually some times when we comment on older post then our url and email_id caught by spam filter plugins. I think you also get caught "wp-spamfree"
Might be also that your IP, IP range or even the country you comment from is blocked / banned by the blog owner. SY
I am also getting this problem on some blogs but I want to ask a question is there any way to get out of that black list of ID, email or getting white head??? any one have idea???