Oh and here’s his latest advice on this:
I have reenabled this option on WP spamshield now, whereas it was disabled before so this particular error should go away.
If issues persist then you will need to contact the developer of this plugin or use an alternative anti-spam solution because this is an issue which is caused as a direct result of this plugin. It seems to be incorrectly detecting certain types of visitors, and when settings are changed it detects others as something else so I think the code on this plugin could do with as bit of tweaking!
Plugin Contributor
redsand
(@redsand)
At the top of the support forum there is a sticky post that we ask users to read first because it guides you to excellent troubleshooting options we have already put together for our plugin users.
Please take a few minutes to work through the Troubleshooting Guide and FAQs, as these solve over 90% of issues users have. (Please be sure to follow all the steps, not just read through them.)
If the information provided doesn’t solve the issue for you, we’ll need a bit more info from you on the specifics, and we’ll need to email back and forth, so please head over to the WP-SpamShield Support Form, and take a moment to fill out a support request. That will allow us to help you diagnose this, find out what the real issue is, and get things working right for you.
– Scott
Please note that the WP-SpamShield Support page is our main support venue, not the WordPress forums here, so that will always be the best way to get a quick response and resolve any tech support issues.