500 on all pages

Created by: Razer6

After updating to 4.1 I can't access my gitlab instance anymore. I always get a 500. Here is my log:

Started GET "/" for 127.0.0.1 at 2013-01-22 19:07:25 +0100
Processing by DashboardController#index as HTML
  Rendered events/_event_last_push.html.haml (0.1ms)
  Rendered dashboard/_activities.html.haml (9.3ms)
  Rendered dashboard/_groups.html.haml (6.1ms)
  Rendered dashboard/_projects.html.haml (41.0ms)
  Rendered dashboard/_sidebar.html.haml (49.4ms)
  Rendered dashboard/index.html.haml within layouts/application (59.6ms)
WARNING on line 46 of /home/gitlab/gitlab/app/assets/stylesheets/sections/notes.scss: "ul.notes .discussion .discussion-body .diff_file" failed to @extend ".borders".
  The selector ".borders" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .borders !optional" if the extend should be able to fail.

WARNING on line 46 of /home/gitlab/gitlab/app/assets/stylesheets/sections/notes.scss: "
 ul.notes .discussion .discussion-body .discussion-hidden" failed to @extend ".borders".
  The selector ".borders" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .borders !optional" if the extend should be able to fail.

WARNING on line 46 of /home/gitlab/gitlab/app/assets/stylesheets/sections/notes.scss: "
 ul.notes .discussion .discussion-body .notes" failed to @extend ".borders".
  The selector ".borders" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .borders !optional" if the extend should be able to fail.

Compiled chosen.css  (63ms)  (pid 19394)
  Rendered layouts/_head.html.haml (3686.9ms)
Completed 500 Internal Server Error in 3776ms

ActionView::Template::Error (Operation not permitted - /home/gitlab/gitlab/tmp/cache/assets/DA6/3B0/sprockets%2Feaaa87c0b944a593f7d95bd820ef43f4):
    4:     = "#{title} | " if defined?(title)
    5:     GitLab
    6:   = favicon_link_tag 'favicon.ico'
    7:   = stylesheet_link_tag    "application"
    8:   = javascript_include_tag "application"
    9:   = csrf_meta_tags
    10: 
  app/views/layouts/_head.html.haml:7:in `_app_views_layouts__head_html_haml__3638890328604006819_30871240'
  app/views/layouts/application.html.haml:3:in `_app_views_layouts_application_html_haml___1173293309671727674_15410220'
  app/controllers/dashboard_controller.rb:29:in `index'

Running on ed17a011