It wasn't a problem in Tiger and you have to print to see it.
The instructions seem pretty clear to me:
"Is Your System ICC Version 4 Ready?
One way to find out is to
view or print this page using your
system.
The test image uses a mix of unusual ICC version 4 and version 2 profiles, one for each quadrant of the image.The test exists as PDF and HTML files, as in both file formats each image can use an unique profiles."
But I have tried printing (and viewing) and the results remain the same.
With Canon printers and PS CS4 on both 10.4.11 and 10.6.4 - no problem.