Redmine

When I try to access the login page on the redmine I get an Internal Server Error, for a while everything is fine and then when it starts happening, no one can access the login page anymore, several postgresql and lighttpd restart eventually got everything working again. I can't figure out how to get more information on what is causing this problem, it seems rather peculiar since it doesn't happen systematically. It happens often enough that I get weekly mails from upset users though.

production.log and fastcgi.crash.log are empty, I can't get any debug in any log (postgresql and lighttpd).

Ubuntu 10.04.4 LTS

postgresql-8.4                      8.4.11-0ubuntu0.10.04
ruby1.8                             1.8.7.249-2ubuntu0.1
rails                               2.2.3-2ubuntu0.1
redmine                             0.9.3-1
redmine-sqlite                      0.9.3-1
lighttpd                            1.4.26-1.1ubuntu3.1

# RAILS_ENV=production ruby script/about
ruby: No such file or directory -- script/about (LoadError)

Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your redMine
administrator for assistance.

It may not be enough to reproduce, and even if you set up the same environment it might take a while for the problem to arise. Can you give me some ways of debugging this? I'll stay tuned on this task until it's resolved.

Thanks.