Mhonarc via Procmail

until my SYSADMIN upgraded the mailserver. I am getting this error message
now:

/%path%/mhonarc: syntax error at line 2: `unshift' unexpected

Any suggestions?  I am using MHONARC v1.2.3 (at least until 2.0 comes out
of beta)

You can email me directly at bschlank(_at_)pacificnet(_dot_)net or leave it on 
the list!

Thanks in advance for your time!

-- brett