[Mailman-Users] "Operation not permitted" when updating aliases in Postfix.py

Hi,

My mailman installation is mostly doing fine, but every time I create a new list, I hit an error while performing os.system(update aliases db) in Postfix.py. I'm not running a secure kernel. I fact, when I do:

su - mailman python -c 'import os; print os.system("<skipped>/postalias <skipped>/mailman/data/aliases");'

I get "0" (zero character) in the output, which means it's OK (?). How come it can't run when a web interface is used? Naturally, my Apache is not running under mailman's uid. Thank you!

Sergey, Source Mage GNU/Linux, http://www.sourcemage.org/.