WM8 reset resulting in errors

After our recent upgrade to WebMaker 8 we are experiencing errors in a number of forms that seem to be related to the reset action.
In many places where we use tables to display larger or complex records we utilize a popup dialog for editing a record of the table rather than editing all records in place. When the user clicks an "Add" button we use reset container to clear any values form the dialog. In WM8 this reset seems to set pick lists to an "undefined" selectedindex rather than to 0. When the select box is displayed is shows as blank rather than displaying our initial value entry of "--Please Select--". Since the reset also causes all of the onchange events to fire, the form throws errors when it tries to access, for example, a property such as control.options[selectedindex].text.
Is there any way to fix the reset so that the select boxes correctly display the initial option (i.e. set the controls to selectedindex = 0)?
We use "reset field in container" mode=reset