error: Object of class stdClass could not be converted to string

I came across an error with the latest dev version*:

Object of class stdClass could not be converted to string in /var/www/d6/sites/all/modules/authorcontact/authorcontact.module on line 127

Here's the fix and a typo correction (referer, not referer**), change this on line 127:

watchdog('mail', 'Author Contact: %name-to was sent an e-mail from %name-from using the form on %page', array('%name-to' => $pageAuthor . " <$to>", '%name-from' => $from, '%page' => $params['referrer']));

to this:

watchdog('mail', 'Author Contact: %name-to was sent an e-mail from %name-from using the form on %page', array('%name-to' => $pageAuthor->name . " <$to>", '%name-from' => $from, '%page' => $params['referer']));

* please sort out your use of cvs, I hope I have the most recent 6.x-dev code but it's hard to tell when you don't use the correct procedure and branches.
** Yes, referrer is the correct spelling, but not the name of the http header or your array key :)