[Comments issue] Doh! Something has gone wrong

Hi all,

I’m having strange problem with comments at my site, running the newest WordPress (2.0.5) and Regulus theme.

I allow everyone to post a comment (no registration required). So whenever user posts a comment, WordPress displays following message:

“Doh!Something has gone wrong, the page you’re looking for can’t be found.

Hopefully one of the options below will help you

You can search the site using the search box to the right
You could visit the homepage
Or you could have a look through the recent posts listed below, maybe what you’re looking for is there……”

This is very strange because, even the error message is displayed, the comment is succesfully posted!!!

At first I thought it’s the issue with “Recent comments” plugin. But I’ve deactivated it, cleared my cache and still did not solve the problem.

The other strange thing is that whenever the user wants to change his current user name, WordPress displays message “Sorry, no posts found matching Your criteria”. So the only way to change username is to clear the browser cookies!!!

Please help me guys. This is very confusing…

Thanks much in advance.