I'm trying to create a Task from Apex for the current logged in user. It seems simple enough, and I'm doing pretty much exactly what is specified in the Developer Guide:

                 //create a task for the user
                //Task newTask = new Task(Subject='Complete Survey for Transaction');
                Task newTask = new Task(Description = 'Survey Transaction',
                                        Priority = 'Normal',
                                        Status = 'Inbound Email',
                                        Subject = 'Other',
                                        IsReminderSet = true,
                                        ReminderDateTime = System.now()+1,
                                        WhoId = userContact[0].ContactId    );             
                insert newTask;

But I keep getting this exception:

Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, Free-form text is not allowed for the Subject field. Please select a pre-determined value from the picklist.: [Subject]

The subject that I've specified ('Other') is in the Task subject picklist, and Task.Subject is supposed to be a String, so I don't know what else I'm supposed to do to get it to match up my subject with the pre-determined values...

Anybody happen to know?

Thanks,

Tom