A bug in Active Record class

[eluser]pickupman[/eluser]
This has been fixed in the 3.0 release which is supposed to released soon. A number of the bugs in 2.1.3 have been updated in the 3.0dev branch. The current changeset has the column alias also use the protect_identifiers wrapping the $alias rather than hard coding them as you have shown.

You may find it helpful to go ahead and update to the latest version available on [url="https://github.com/EllisLab/CodeIgniter"]Github[/url].