Many users find out a problem using Wp-OpenID plugin or using Firefox as browser and enabling its own password management.
Pseudotecnico find out the real mistake, when hiddy randomly choose a password type field it should be filled by automatic password management so the comment will be checked and signed as spam, the same thing happens with the Wp-OpenID pluing.
So now i released the 1.2 version, enjoy the new plugin, download it
Buy me a coffee