mj_create_list fails with postfix

Hi,

I am trying to get the mj_create_list script from majorcool working with 
majordomo.  When I try to create a list through majorcool using the 
script, it errors out saying: Checking for existing aliases... address 
'$list' already exists.  It doesn't matter what I call the list, it will 
fail.  I did some poking around in the script and the following line 
causes the failure.

&squawk("address '$list' already exists")
                unless system("$sendmail_command -bv $list >/dev/null");

We are using postfix for mailing and from what I can tell, postfix will 
return 0 whether $list exists or not, causing the squawk command to 
always execute.  Anyone have any ideas of how I can get this working 
with postfix?

Thanks,
Duncan Cunningham