For one thing, 10.6.5 updated the firmware on many of the Airport wireless cards used in their laptops. Unfortunately, when updated laptops try to connect to the wireless network at work, the laptops get kernel panics.
I see, and this bug experienced by some (not all) users is the sort of thing that never happened before? There weren't data loss issues with 10.2, or issues with printer drivers when moving from 7.5 to 8? I don't see any drop off, I just see a larger use base highlighting the inevitable bugs that will creep in because it's not possible to test every hardware and environment configuration.
Mac software and hardware has been getting better over the last twenty years, not worse.
The product line is stronger, Apple is now an establish, mature, successful company, product share is growing. And yet people still criticise and talk about a fall off in quality standards. Seriously - compare an old performa to the aluminium 27" iMac (which is significantly cheaper in real terms) and tell me that quality has fallen?
As far as people complaining that the OS update cycle is now too fast - what are you drinking? It's less than 7 point upgrades in 15 months - and if they require a restart - so what? What does that two minutes take out of your life? I think a few people need some perspective, or to stop using Apple products and go back to acer/dell/hp and learn what the alternative is.
Utterly ridiculous.
It's because 10.6.5 is riddled with issues causing Kernel Panics and other quirkiness.
Apple Support Thread 1
Apple Support Thread 2
Webkit Plugin was my culprit for KPs which only started happening after 10.6.5.
Anyway, I removed the plugin from my installed plugins and all is fine (for now).
JP
Again, did some people experience this, because no one I know did. For the record flash runs as well as can be expected on my devices - it's no better on the windows 7 machines than the Macs. Maybe because i just install as instructed and don't tinker or run beta software/plug-ins. All this "repair permissions" - never done it in my life - I simply go to software update and update. If there's an issue (yet to happen) i simply turn to time machine. I don't tinker with the OS, I don't hack, tweak and customise, I don't jailbreak, I just use as intended. And you know what - no issues. We're not talking one mac here we're talking an installed base of 19, including 10 27" iMacs and my entire history of mac use going back to a beautiful LC II back in the day.
Interesting to note that one of your links talk about a plug-in causing problems, a plug in not created or maintained in any way by Apple. Not sure how that is Apple's issue? One is a single user with an issue which can only be something specific with their set up. One person having a specific issue with their computer does not make a company or OS low quality. There are normally common factors among those experiencing issues, and in the rare event that there is a common hardware fault with a specific batch, apple investigate sensibly before issuing a fix/replacement.