Posted a new update that should help with the to_members error on placing a bid in certain cases
http://www.smfhacks.com/index.php/topic,1149.0.htmlFor permissions the way the Classifieds works is there are two types of permissions.
First Global SMF permissions -> Found under Admin -> Permissions. Then modify a group and find the SMF Classifieds permissions area.
These are the core permissions that set whether a member can view,place bids,add listings, manage the classifieds system etc.
Make sure that each group that you want to have access have the classifieds settings setup.
Second category level permissions. Category level permissions is an option to allow you to restrict access to classifieds options for certain membergroups for a category. These permissions are not needed if you do not need to restrict options based on category.
Also in order for a permission to work they must also have the same global permission.