Description

Symfony cache isn't working correctly with eZ Demo. If you create a folder in the back office, and a article, inside that folder and visualize it on the frontpage everything seems fine. However if you remove that article and try to view the folder, the article is still present, even if you clear eZ Publish cache.
The object only disapers if you clear Symfony cache.
Another problem is that if you create a folder, in the admin interface, the subtree in the left doesn't show the folder.

Steps

1. Login into admin interface, using admin account
2. Click on "Contente structure" from the top menu
3. Click on "Create new" button
4. Choose "Folder" from the drop down list
5. Fill in the field
Name (required): News

6. Click on "Send for publishing" button
7. Click on "News" folder
8. Click on "Create new" button
9. Choose "Article" from the drop down list
10. Fill in the fields
Title: Article 1
Summary: Article 1 Summary

11. Click on "Send for publishing" button
12. Access the frontpage
13. Click on "News" folder
14. Verify the article is present
15. Remove "Article 1" from the backoffice
16. Verify the article isn't present on the fronpage