[web2py] crud.update not updating image correctly?

[Rob]

db:
db.define_table('Item',
                Field('description'),
                Field('need', 'boolean'),
                Field('image', 'upload'))

controller:
def update():
    item = request.args(0)
    form = crud.update(db.Item, item)
    return dict(form=form)

When I upload a different image, the old image still shows until a
page refresh happens.  What trickery do I need to do it to act
correctly?

Thanks again...