As of apache-2.0.52-r3 and 1.3.33-r1 Apache uses new configuration and module locations. Mailman currently has these locations hardcoded in the ebuild. Mailman needs to inherit depend.apache eclass and use the variables that are set in that eclass for appropriate paths.
Thanks for taking care of this in 2.1.5-r3 :)
the mailman ebuilds are still not patched. @mholzer, langthang: you look like the ones who might be responsible :-)
I'm on it now, they'll be in the tree in the next within the next half hour.
great, thanks!
Updated mailman ebuilds (2.1.5-r5 and 2.1.6_beta1-r1) are now in the tree, marked testing.