White screen of death!

Question

After debugging a codeigniter app that were installed into a new development environment, I have started to freak out when seeing white screens with nothing more available.

Answer 1

Ensure that there's no whitespace in your files output outside of the CI buffer, especially if compression is turned on. You can test this by turning off compression in your CI config file.

See step two at: http://codeigniter.com/user_guide/installation/upgrade_141.html (Note that while this is for the upgrade, it contains a snippet of the config file which explains the problem.)