Trying to check RT::Queue rights

Hi guys,

I am getting these a lot in my rt.log:

Apr 6 09:16:34 proxy.intern.seceidos.de RT: Trying to check RT::Queue rights for an unspecified RT::Queue (/usr/local/rt3/lib/RT/Principal_Overlay.pm:377)

Whats going wrong here?

Kind regards,
JP