[eluser]jedd[/eluser]
I feel we are going in circles here, and that perhaps you're not aware that there's a user manual for CodeIgniter (handy for explaining differences between flash and non-flash session data, f.e.)
The reason you might not use flash (as I mentioned way back when) was because you need to refresh it on every pass-through a redirect page. This can be tiresome.
If you are committed to catching the data and displaying a pop-up based on the contents of same, then normal session data makes as much sense.
If you tend to write bodgy code which would result in you not catching these 'notes to yourself' that you store in session date, then you would indeed be better off using flash-data, as it'll save you from yourself (or, as you put it, not clog up your userdata).
