Maybe I didn't drill down far enough on that site. I actually followed the link from Carolyn's post above, but didn't actually attempt a download. As a side note, I recently installed Mavericks, and didn't require any additional drivers or software of any kind for my Canon Pro9000.
I'll double check the link in my Mac as opposed to my iPad.
Update: There was a driver update available for my Pro9000, but my MP830 Multi-Function gave the exact message that you received. This would indicate that the required driver for the i9900 is indeed included with Mavericks.
Have you had issues when trying to use the printer?