Sessions, some work, some donn't.

[eluser]jedd[/eluser]
[quote author="smick" date="1268460080"]
It sounds like a bug in my model, but I tried restoring it to a version that I was running several months back ....
[/quote]

[url="http://progit.org/book/ch6-5.html"]git bisect[/url] is your friend with these kinds of problems. (Though it sounds like you're not using a VCS at all - if so, tsk tsk

Glad to hear that it was not a CodeIgniter problem at all.

Aside - I tend to do all my session stuff in controllers, even if it means double-handling them into method parameters, or attributes, on the model side. Not sure if this approach would have prevented this specific problem, but might have made discovering it a bit easier.