Stack Level Too Deep in Production Rails App - How to Get Details?

I am getting up and running with Spree in production on a 256MB Slicehost slice with MySQL, Mongrel, and Nginx. I am getting this error every time I try to access any URL in the app:

SystemStackError (stack level too deep):
  compass (0.8.17) lib/compass/app_integration/rails/action_controller.rb:7:in `process'
  vendor/plugins/haml/rails/./lib/sass/plugin/rack.rb:44:in `call'

(Some more test url requests are in this pastie)

What are the advanced (but free and open source) debugging strategies/tools I should use while in production mode so I can do better at solving this problem?

It's slightly different each time depending on the controller. I have tried increasing my stack size, but that doesn't help because there's probably just some loop I can't find.

The question is, how do I get a more detailed report of the exact output while in production?

I am using Deprec and Capistrano to execute all server side commands. I am running a mongrel cluster of 3. The log files I see are:

current/log$ ls
development.log
testsite.com-error.log
mongrel.8000.log
mongrel.8001.log
mongrel.8002.log
mongrel.log
production.log
testsite.com-access.log

I'm just looking for some advanced debugging strategies/tools while in production mode so I can do better at solving this problem. Maybe some cap tasks for streaming/debugging (or conditionally break-pointing!) the production app (really, a staging app) locally (do people do that?), or something that spits out every single thing that executes in code?

Thanks

I'd check all of your gems and plugins and any other dependencies your application might have: I'd guess that you're missing something (or have the wrong version of something) and it's failing badly enough that it can't even spit out a can't find require message.

check your action controller. On line 7 is most likely where the loop occurs.

Seems you have initiated some endless recursion on line 7 of your controller. Check if you are calling the same method inside the method.