Have anyone else stumbled upon this weird behavior? Setting the config.cache_classes = false for development env causes rails to return responses with totally empty content, headers seem to work ok. It does not matter what the controller returns, even a simple :text => "OK" will result in empty page.
I'm using rails 3.2.2 and ruby 1.9.3.
It probably has something to do with the overall gem configuration etc. because testing with out of the box app "rails new testapp" with one generated scaffold seems to work ok.
Here is the gemfile: