Unfortunately this is an impact of the use of the interaction log. Saving custom fields to a task in the Console via the adapter is not available out of the box. It requires some customization.

There are 2 ways to resolve this

- Via a salesforce trigger on tasks and a modification to the toolkit (code below)

- Using a custom interaction log (see http://blogs.salesforce.com/product/2012/02/custominteractionlog.html)

Both options are farily straight forward. Going with the trigger option requires less coding but also an adapter modification as described below. The visualforce option gives full control and customization ability to the customer. It is the preferred method due to this when there is a VF skillset on the customer side.

This is a challenge multiple partners have run into. With the new Cloud CTI API available in June with Summer '12, you will be able to embed your own custom web softphone directly into salesforce, and save logs to any objects with any fields specified via a JavaScript map. No more client, no more toolkit, no more disconnect. Also, the same API will work consistently across the standard salesforce app and Service Cloud Console.

Please update if more input is needed.

Trigger Code:

First - Remove the code block  if (pLog->GetIsCtiWidgetMode()) . The GetAppExchange()->UpsertCallLog(pLog);  should always be called.

Then add the code below as a Trigger on tasks in the salesforce org.

<pre>

trigger upsertOnCallObjectId on Task (before insert, after insert) {

    if (Trigger.isBefore) {

        Task[] preExistingTask = null; // A pre existing call log based on the callobject field

        for (Task t : Trigger.new) {

            preExistingTask = [SELECT uuid__c, id, ActivityDate, subject, whoid, whatid, callType, callDisposition, description FROM Task WHERE callobject = :t.callobject];

            if (preExistingTask.size() > 0) {

                if (t.uuid__c == null ) {

                    t.uuid__c = preExistingTask[0].uuid__c;

                } else {

                    t.callDisposition = preExistingTask[0].callDisposition;

                    t.subject = preExistingTask[0].subject;

                    t.whoid = preExistingTask[0].whoid;

                    t.whatid = preExistingTask[0].whatid;                   

                    t.callType = preExistingTask[0].callType;

                    t.description = preExistingTask[0].description;

                    t.ActivityDate = preExistingTask[0].ActivityDate;

                }               

            }

        }       

    } else if (Trigger.isAfter) {

        Task[] preExistingTask = null; // A pre existing call log based on the callobject field

        for (Task t : Trigger.new) {

            preExistingTask = [SELECT id, subject, lastModifiedDate FROM Task WHERE callobject = :t.callobject ORDER BY lastModifiedDate ASC];   

            if (preExistingTask.size() == 2) {

                delete preExistingTask[0];

            }

        }

    }    

}

</pre>

Note that in the task trigger, you would need to add the custom fields ou are saving.