ActiveCampaign/activecampaign-api-php — pull request #2 by thomascrepain (2013-11-20 11:37:17+00:00)
Title: call to list/list requires the param ids. Post data added to the list/li...

According to http://www.activecampaign.com/api/example.php?call=list_list, the param 'ids' is required.
This was not possible in the previous implementation.