Hi Don.
Early on in this débacle, when I was still in email correspondence with Kevin Connor and Tom Attix of Adobe, I asked if - as a result of the testing they were doing, and had done - they would send me, or publish, a list of printers with which it was possible to print accurate targets without colour management. This, along with information about the printer driver and the version, and iteration of OSX - and any other relevant details.
This they have not done, despite repeated and polite requests.
It is reasonable to surmise, therefore, that they have been unable to find a sufficiently robust workaround with CS4, and that this effects ALL printers.
I am interested in your workaround. I recall that when I tried it with OSX 10.4.11 (Tiger) the targets were printed with some patches clipped (patches with different colours were printed identically*) and thus were not suitable for profiling. I will, however, try it again to be absolutely sure.
* I used a target printed from PS CS2 as a benchmark.
The problem with diagnosing this particular problem is that it is necessary to do the tests extremely meticulously, carefully documenting what settings are used, and use a known benchmark print to compare results with. Some correspondents on this website have clearly not done this and their results, and comments, only muddy the water - unfortunately (I am not suggesting for one moment that you are one of these).
The whole situation is an awful mess ! This is much is clear.