xmon 4.3 - COMPACT: usage

The bb-hosts for 4.3 includes the following:

COMPACT:COLUMN=COLUMN1,COLUMN2,COLUMN3[;ditto]
              Collapses a series of statuses  into  a  single  column 
on  the
              overview webpage.


Has anyone used this successfully, or has an example of usage?  When
I've tried this, it does not create a new column on display, but it does
seem to make all the tests I list except for the first one unclickable
(other words, clicking the icon seems to do nothing).
-Alan