Onscreen posterization

Question

In Aperture, and only in Aperture, I get really dramatic posterization in the shadows of my images (both raw and jpg.) The same file, opened in any other application shows a smooth transition. In fact, even if I open the file in external editor from Aperture, the opened file has smooth transitions.
At first I thought I might have an onscreen proofing problem, so I checked that and I am confident that onscreen proofing is disabled. Is there anything else that might be going on to cause display problems? (This happens on both my primary and secondary monitor, if that matters.) Both of my monitors are freshly calibrated w/ xrite hardware.

Answer 1

Sean, I'm right there with you - I'm still having that exact same problem myself.
I've turned off the proofing, cleared the preferences - everything - Yet, I'm still having the same posterization issues myself, still. Once again, It's not on every single photo - but just most of them, particulary the darker ones, but I've had perfectly exposed images (without much darkness) do the same thing.
I've already upgraded to 1.1 as well, but STILL having the same crazy issues.
I did however read on some other Aperture forums & OSX forums, that it's really looking like it's the 'OSX 10.4.6' update that's causing most of these issues - PLUS, many others in other programs. Apparently another issue with the new 10.4.6 update is it's sometimes causing the 'dock' to not open applications 'automatically' (where it does the little 'bounce') - instead, you have to open them by right-clicking on them, and open them manually. Oddly enough, after reading that & about 6 hours later, guess what? - mine started doing it as well.
This is just what I've read in other forums concerning these issues, and most of them seem to be pointing the finger at the OSX 10.4.6 'bug'. Who knows?
At least you're not alone on this one.
Please keep us posted if you or anyone else in here, hears the 'fix' on this one. It sure would be nice to use Aperture to it's fullest potential. For a flagship 'photo imaging' program like Aperture, - 'posterization' is pretty much one of the LAST things one would want to plague a program like this. That's about like saying, "I just bought this new, 12 mega-pixel DSLR camera, but it ONLY shoots in 'sepia' mode, not color - other than that, the camera works great!
I'll let you know if I read or hear of anything alse myself.
*(ps) I went to my local Apple store yesterday & told the people there about this issue & they said they had never heard of it or had any problems like it from Aperture. I took the guy over to one of their powermac G5's & opened a stock image in the external editor (CS2), and on the 3rd try - there it went, right in front of the sales rep. (He couldn't beleive it either!) he made an immediate call to Apple headquarters, & they DID tell him that OSX 10.4.6, WERE starting to get a lot of 'bug' issues reported -worldwide. This also included the 'posterization' issue within Aperture, but apparently, there's a lot more problems going on with 10.4.6, then even we've all heard of.
I just hope that they can get this problem fixed as soon as possible for all of us who are having to deal with this little bug.