[split] CodeIgniter 3.0 RC2

A note about this may be added, but that would be just a tip. In fact, a suggestion to use session_write_close() already exists, although only under the database driver section (for reasons other than ajax usage).

It's not a "huge problem" like your original thread is titled, nor an issue at all. Comet is not an easy thing to do right, and neither are sessions - the more complex stuff you deal with, the more details you have to have in mind.