current_page? in Rails 2.2.2 delivers wrong results

I recently upgraded my rails app from 2.1.1 to 2.2.2 and now the current_page function sometimes delivers wrong results. It worked fine on the old site.

The function returns true if the current uri is /users?filter=x and you pass in /users (options are empty). I believe the result should be false in this case.

here is the current code:

  def current_page?(options)
    url_string = CGI.escapeHTML(url_for(options))
    request = @controller.request
    # We ignore any extra parameters in the request_uri if the 
    # submitted url doesn't have any either.  This lets the function
    # work with things like ?order=asc 
    if url_string.index("?") # <<<< This test seems to be the problem <<<<
      request_uri = request.request_uri
    else
      request_uri = request.request_uri.split('?').first
    end
    if url_string =~ /^\w+:\/\//
      url_string == "#{request.protocol}#{request.host_with_port}#{request_uri}"
    else
      url_string == request_uri
    end
  end

If I ommit the marked test and do never split the request_uri everything works fine.

I would deliver a patch if I knew how to do it.

Thx for any help