ChiliProject is not maintained anymore. Please be advised that there will be no more updates.
We do not recommend that you setup new ChiliProject instances and we urge all existing users to migrate their data to a maintained system, e.g. Redmine. We will provide a migration script later. In the meantime, you can use the instructions by Christian Daehn.
Groups don't scale with a high number of members (Bug #167)
With groups containing 2000 users or more, adding the group to a project can take in excess of 3 minutes. After it finishes, loading of the project index page can take 2 minutes as well.
I recommend that groups be able to become full members of a project, with just a link shown to the group member list page, which would use pagination appropriately.