Sorry, the "postinstall" script was buggy (unbelievable, isn't it ;)
Please, download and install PAC 22.214.171.124 from souceforge's usual repository.
And please, let me know if that worked! :)
PS: in case of failure, please, uninstall pac, then rm -rf /opt/pac, then install pac again.
PS2: I know, I suck... :( Sorry for the inconveniences of shitty releases, I'm just too impatient!