participants list in korganizer

I'm using korganizer 3.5.9 (KDE 3.5.10 rel. 21.9) to administrate meeting 
dates.  Some of the attendees do have email addresses, some do not.  I 
noticed that I cannot enter the identity of a participant without an email 
address although that person does have an entry in kaddressbook.

Is this intended behavior or did I miss something?  If it is intended, I'd 
vote for changing this.

Thanks for enlightenment, Bernd