Flashdata being set but can't be echoed

[eluser]jedd[/eluser]
[quote author="ChazUK" date="1257870018"]
I'm using $this->ci-> inside of my own class, which doesn't extend any models or controllers.
[/quote]

Ahh .. that's interesting, isn't it.

Why not just $ci?

But I digress.

If you set some normal session data, in that place, can you retrieve it at the other end? It'd be good to know whether all session data is breaking, or just flash. Basic trouble-shooting and all that. It's not clear if you've already tried this.