Each time I go to personal setting I get the following:

Thu Feb 24 07:49:03 2011] [error] [client 192.168.0.1] PHP Fatal error:  Call to a member function request_form() on a non-object in /usr/share/roundcubemail/program/steps/settings/func.inc on line 236, referer: http://myhost:81/?_task=mail

Can someone please help?
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Stephen Cox