Pan stops showing more than one message header column

I'm temporarily trying Pan (with same profile from a working installation 
of Pan on other OS) on Kubuntu.  I must say it's a poor implementation of 
KDE.  In this, Pan only shows one message header column (either author, 
subject, date, etc.)  What can I do about that?  It's not a resize issue; 
the cursor never goes over a place I can resize it to get the other 
columns.  They are just not displayed at all.