System error when clicking queue in Quick Search listing

I’m on my RT 3.0.5 home page, and under Quick Search I have several
queues listed. I just encountered a system error (details below) when
clicking one of the queues to view. I then went back to try selecting
another queue and received the same error. Any ideas?

Thanks,
Mike

error: Can’t call method “HasRight” without a package or object
reference at /opt/rt3/lib/RT/Queue_Overlay.pm line 1001.
context:

997: $RT::Logger->debug(“Principal undefined in Queue::HasRight”);
998:
999: }
1000: return (
1001: $args{‘Principal’}->HasRight(
1002: Object => $self,
1003: Right => $args{‘Right’}
1004: )
1005: );

code stack: /opt/rt3/lib/RT/Queue_Overlay.pm:1001
g /opt/rt3/lib/RT/Queue_Overlay.pm:967
g /opt/rt3/lib/RT/Queue_Overlay.pm:943
g /usr/lib/perl5/site_perl/5.8.1/DBIx/SearchBuilder/Record.pm:409
g /opt/rt3/lib/RT/Tickets_Overlay.pm:896
g /opt/rt3/lib/RT/Interface/Web.pm:670
g /opt/rt3/share/html/Search/Listing.html:101
g /opt/rt3/share/html/autohandler:182
g