This bit of apex used to work fine, to display the list of account team members, fetched from the accountId on a case, and allow users to transfer ownership to just those members. In our case only one accountTeam is populated, with 28 members. And code worked great.

Recently the pick list is populated with virtually every user in the SF instance. And they are not members of the original 28. Something like 84 users show up.

Is this is bug in Apex 09? I have no other changes made to the system to account for such odd behavior.

public class AccountTeamCaseTransferExt {

    private final Case c;

    String teamMember;
 
    public AccountTeamCaseTransferExt(ApexPages.StandardController stdController) {
        this.c = [SELECT Id, AccountID, OwnerId FROM Case WHERE Id = : stdController.getID()];
    }
 
    public PageReference transfer()
    {
   
        if (this.teamMember != NULL)
        {
            c.OwnerId = this.teamMember;
            update c;
           
        }
       
        PageReference pageRef = new PageReference('/' + c.Id);
        pageRef.setRedirect(true);
        return pageRef;
    }
   
    public List<selectOption> getTeamMembers()
    {
       
        List<selectOption> options = new List<selectOption>();
        options.Add(new selectOption('', '-- None --'));
       

       
        if (c.AccountId != NULL) {
            for (User u : [SELECT Id, Name FROM User WHERE Id IN ( SELECT UserId FROM AccountTeamMember WHERE AccountId = : c.AccountId) ORDER BY Name ASC] ) {
              options.Add(new selectOption(u.Id, u.Name));
            }
        }
        return options;
    }
   
    public String getTeamMember()
    {
        return this.teamMember;
    }
   
    public void setTeamMember(String s)
    {
        this.teamMember = s;
    }
    
}