tactics for upgrading CodeIgniter?

[eluser]sneakyimp[/eluser]
[quote author="CroNiX" date="1406752023"]Sure, follow the upgrade guides: https://ellislab.com/codeigniter/user-gu...ading.html
[/quote]
The latest version listed in that list is the one I have, 2.2.0 and this is apparently the latest version. I guess I misread the post I had linked -- that bug still exists in version 2.2.0.

Where do I report a bug?