Hi,
I just installed antix (8.5) and I have run into all kind of problems when installing software. Before installing anything I edited the sources.list to comment the lines pointing to testing and enable the ones pointing to stable.
After that I updated and tried to install build-essential from synaptic: due to dependencies problems it could not be installed (the only libc6-dev available was from debian stable and older than the instaled libc6).
Installing mysql-server was also troublesome: some stuff could not be configured due to conflicts with exim4.
In order to solve this I tried enabling the mepis repos in the source list hoping that there would find sofware compatible with the antix base: synaptic told me that could not upgrade (more conflicts) and anyways the only libc6-dev available was from debian.
Since this was starting to look a bit messy I decided to try a clean install: reinstalled and decide to give a try to the mepis version of sources.list (after all antix is based on mepis):
========= SCRAPER REMOVED AN EMBEDDED LINK HERE ===========
url was:"http://www.mepis.org/docs/en/index.php/Sources.list"
linktext was:"http://www.mepis.org/docs/en/index.php/Sources.list"
====================================
. The upgrade went without trouble, but installing software (firefox from the mepis repo, per example) still results in conflicts.

So there is someway to run antix with stable repos only without running into this dependencies conflicts, etc? How come I got conflicts with both debian stable only repos (without mepis) and mepis repos (maybe the antix install contains packages from testing too)?

antiX is 99% Debian Testing (squeeze) whereas MEPIS is 99% Stable (lenny) so using either repo is likely to lead to dependency problems as you have found out. To keep antiX as stable as possible, you'll need to change Testing to squeeze and so that once squeeze goes stable, so will your antiX-squeeze version.

Installing apps from MEPIS repo is not advised. Use MEPIS repo only for kernel upgrades (if there are any)