Thanks for reminding me why I moved to Macs.
Sadly, this is more of a myth than anything else. Yes, HFS+ generally does a good job of keeping files
defragmented, but it does a terrible job of keeping free space defragmented.
What this means is that you might find you suddenly go over some threshold point and disk performance is absolutely terrible. That said, I just loaded up iDefrag to check the status of my drive after seeing this post.
Due to some problems I've been having lately, I just wiped my Mac and reinstalled a couple of days ago, and already the drive is pretty fragmented. (and this is files, not free space)
(the bar along the bottom is the status of the whole drive, red is fragmentation)
It would be great if there's a new demosaicing algorithm in Lightroom 3, as I'm constantly running into problems with images from my 1000D. (yeah, I know it's a low-end camera, but that shouldn't matter)
I don't have any example images to hand, but it's very similar to this example from the DxO site
(DxO's conversion for comparison
I also agree that it would be great if that base noise reduction could be removed for a finer grain structure. I realise that it sounds like I just want DxO… well, I like some of the technical aspects of what they can do with RAW files, but I much prefer Lightroom's interface and find it's much easier to get the look I want from images using it.
As for 2.4… it all seems to be running smoothly here. Can't say I've really noticed any performance loss. (or gains) Don't think I've ever had Lightroom crash on my Mac, and I use it all the time. (ever since the 10.5.2 update or so, it's had the ability to crash Spaces if I switch to Lightroom—which should take me to the space it's on but doesn't—and then manually go to that space)