Components actions with 1.1.6

Hello since the 1.1.6 upgrade, I can’t call a component action from a
my component is for example:
my component is located at /components/plugin/themeswitch
I usually did
<%= start_form_tag :controller=>‘plugin/themeswitch’,:action=>
‘changetheme’ -%>
but now the app answers with 404 error (I understand it’s because of the
bug fixin 1.1.6 but it worked with 1.1.5)

How can I access to the action again? I think I should create a route
I need a generic route to make all the components under
/components/plugin/ accessible.

Any clue?

Thanks for your help