Maybe related to:
http://omeka.org/forums/topic/omeka-20-issues#post-20702
but when trying to add an image, I get the following message:
Omeka has encountered an error
To learn how to see more detailed information about this error, see the Omeka Codex page on retrieving error messages.
When i try to edit the .htaccess file in the root, I do not see an entry for:
php_value display_errors