I've been unable to retrieve error messages in Omeka 2.0 using the instructions here: http://omeka.org/codex/Retrieving_error_messages#Omeka_2.0
I've uncommented the following in .htaccess:
SetEnv APPLICATION_ENV development
It simply doesn't do anything on either existing or fresh installs. I'm wondering if it is host-related (I'm on Webfaction). Any ideas?