Certain browsers including Firefox does not convert links & in it to &. That causes problems further in rails applications, where params gets created using parse_query_parameters method.
The query strings with & get parsed as key part e.g. query sting with &name=david would get converted to params as params[amp;name] instead of params[:name]. Ideally browser should convert & to & whenever it parses query strings. But that is not the case for current browsers.
This could be serious issue. The rails helper page.redirect_to outputs window.location links to have & in it. So page.redirect_to having additional params(other than controller, action, id) simply doesn't work.
here is the url to my commit to koz-rails fork for the fix.
http://github.com/anildigital/koz-rails/commit/077e8de4214d7958600b328c4fbd63215ecec7dd
