Hi:
We have a Canon IP 4300 purchased, June '07 in the US. I am happy to report that the Quick Start Guide pg 84 instructs the user that the orange printer alarm flashing 13 times (ooooo 13 is, a scary alarm) means, " an ink tank that was previously empty has been installed" This alarm can be overridden by holding the resume/cancel button for 5 sec. This disables the ink detecting function and Canon is not liable for print head damage bla bla bla.
Our 9th grader now runs my old i850 that was refilled from new. 6 years, one print head replaced in many thousands of pages printed. My current work horse is a 3 year old i9900 with hundreds of hi res 11 x 17 photo prints under its belt, plus all my regular printing.
The Canon cartridge is the best there is, self filtering, large volume & refills in a breeze. May they never change it.
Thanks to everyone who pointed my in the right direction on this Forum.
jT