Cannot modify SafeBuffer in place

[bokor]

Got this error when I installed the gem and copied the refinery default templates

TypeError in Pages#home

Showing /Users/bokor/.rvm/gems/ruby-1.9.2-p180/gems/refinerycms-core-1.0.0/app/views/shared/_head.html.erb where line #11 raised:

Cannot modify SafeBuffer in place
Extracted source (around line #11):

8: <%= yield :meta %>
9:
10: <%= stylesheet_link_tag stylesheets_for_head(stylesheets||=%w(application formatting theme), theme ||= nil),
11: :cache => ("cache/application" if Rails.root.writable? and
12: RefinerySetting.find_or_set(:use_resource_caching, true) and
13: request.env['HTTP_USER_AGENT'] !~ /MSIE/ and (theme ||= nil).blank?) %>
14: <%= stylesheet_link_tag "home", :theme => theme if home_page? %>
Trace of template inclusion: themes/shelterexchange/views/layouts/application.html.erb

[nickurban]

I'm having the same problem when I try to upgrade my Refinery 1.0 app from rails 3.0.7 to 3.0.9