Multiple Folder

Hi,

I am struggling to setup a multi folder. According to the manual it
should be something like

*%Sent Items,%INBOX

in order to display inbox and sent items in one folder. It works for
the Sent Items and it does recognise the items in the Inbox but it
does not display them.

I can make a multi folder such as

*%Sent Items,%Deleted Items

and it works as expected, displaying both folders in one, just %INBOX
does not work. Now

elmo-message-flags: Wrong type argument: arrayp, nil

does not tell me much, is there anyone who could help me?

Here is the part I receive in *Messages*

Loading msgdb for *%Sent Items,%INBOX...done
Loading msgdb for %Sent Items...done
Loading msgdb for %INBOX...done
Checking folder diff...done
Checking folder diff...done
Making thread...
Updating marks...
Scoring...done
elmo-message-flags: Wrong type argument: arrayp, nil
Wrong type argument: arrayp, nil

Thank you very much
Petrik