Ever since I switched hosts, I'm getting these huge files (6-7mb) in my root directory... What are they from and how can I stop these?
Those sound like Core Dumps: http://en.wikipedia.org/wiki/Core_dump It's down to the host/your applications terminating abnormally. Jay
Take a look at any applications or scripts that your running and determine if they are compatible with the versions of software running on the new host. Something may not be compiled correctly or might be something is deprecated and causing the core dumps.