Error while posting new thread. Call to a member function fetch_field() on a non-obj

[ImportPassion.com]

Fatal error: Call to a member function fetch_field() on a non-object in /home/xxxx/forums/includes/class_dm_user.php(1427) : eval()'d code on line 3

any ideas? haven't changed anything recently. I heard of users getting this sporadically as well.

[Jake Bunce]

There is a problem with the code. Try disabling your plugins and uploading the original PHP files for your version.