formulator troubles

After some weeks i discoverd ( stupid me ) a bug in the extension. I'm using
a form.form to show the fields i want to be filled in and edited ( in
another form.form. ) The problem lies in the edit mode. After someone
changed the values and pressed the save button a save_helper.py will save
the values into the object. 

For almost all fields this works well only for the multicheckboxes it
doesnt? Im using an IF statement to know which form ( node ) im dealing with
and what i should do then. 

For the multicheckboxes this is something like this: 

editor.replace_text(node, ', '.join(request['field_'+node.nodeName]))

if someone checked only 1 value in the formfield it goes wrong.. lets say i
have the following values:

dutch | dutch, english | english

the code stated above will split this into pieces where it encounters a
comma. When multiple boxes are checked this does work and everything works
well. But for some reason when someon just checked one box I get the
following output:

d,u,t,c,h, 

I dont know whats causing this because im using the same technnique on
adding ( creating ) a new object to create the xml out of the data im
getting from the form. Also why does it insert comma's when it has to join ?


I tried to fix this by inserting a if statement that counted the elements
and if it was bigger then 1 join the element's otherwise get me the value of
the first. This didnt work, why I dont know because it just gave me a
runtime  error without telling me what's wrong. 

Could somebody tell me how to fix this strange behaviour or, if not fixable,
telling me its a bug :P

Yours Sincerely,

J.somhorst