White (Blank) Page When Session Class is Loaded

[eluser]Unknown[/eluser]
Hi all,
I've been using CodeIgniter for several years now and am having trouble with a dev site.

If I autoload the Session class, I get an entirely blank page. I've tried changing any/all of the config settings for sessions (encrypted/not, database/not, name, prefix, etc).

What's interesting though is that if I delete or rename any of the session information, one (and only once) page load will result in success regardless of page. Any subsequent page loading (whether the same page or another) will result in a blank page.

I have checked my logs (log threshold set to 4) and there are no errors.

I don't think I've used any of the reserved names from the User Guide.

I also have php.ini set to:

Code:

error_reporting = E_ALL
display_errors = on

Are there any common known issues out there that cause the Session class to interfere with the normal behavior of CodeIgniter?