I have a problem: Recaptcha does simply not appear.
What I did: Created SQL tables, installed and activated the plugin, registered at recaptcha service, copied and configured config.inc.php with the pub and private keys... Hmmm.
EDIT: What's wrong? With phpmyadmin (I'm on a web hoster) I can see the MYsql rcguard table has NO entries...
EDIT2: SOLVED, I was stupid. I added the 'rcguard' entry to an outcommented plugins line (//) OMG
So, the plugin WORKS NICELY. THANKS!