The only case that I saw which needed Cookies to be deleted
was where the user had both disabled AutoComplete for web forms
and requested no password saving. Otherwise I think that the designed
method of restarting the prompt is to delete the userid from the web form
just like any other AutoComplete form data. When you enter it and its password
again you will again be given the opportunity to have its password saved.
There is one quirky thing that I saw about the restart procedure:
when I entered the password I didn't see any asterisks.
This is very confusing but if you have faith that you typed it correctly
and press Enter as if you did you will see the prompt.
Notice that you only ever see the prompt after you hit Enter;
so that last part is normal.
I agree with Don that there are abnormal cases which seem to be
cleared up only by deleting all stored passwords. IIRC the examples
of those that I have seen all involve userid fields which can not be deleted,
thus preventing the associated password from being deleted and thus
preventing the procedure I described above (by "designed method")
from occurring.
HTH
Robert Aldwinckle