error on page with no webform

Running Drupal version 6.19

On a page with no form, when I edited this page and saved it, got this message:

* warning: array_filter() [function.array-filter]: The first argument should be an array in /home/econtent/public_html/sites/all/modules/webform/webform.module on line 878.
* warning: Invalid argument supplied for foreach() in /home/econtent/public_html/sites/all/modules/webform/webform.module on line 878.
* You may not submit another entry at this time.

I assigned the webform to appear on content type pages, as I have pages like: jobs, advertise ...
the page I'm getting error from has a list of authors and no form setup.

Another issue is I get the last line from the error message above when I view this page multiple times.