Apple's iOS 6 Wi-Fi problems linger on
zdnet.com
zdnet.com
The very simple solution is to wait. I always wait for the first major patch to OS X before upgrading, and a couple of months before new hardware. While I don't have the latest shiny gadget, my life is a lot simpler.
I shudder whenever I see someone upgrading the development machine their professional life depends upon to the new version of OS X on release day.
The Arch Linux demographic.
I have a working arch install. I don't touch it unless I have to reboot for some reason and then I read for known issues, do the upgrade and then reboot. Otherwise, no touchy.
I use Fedora these days out of laziness, but rolling releases was one of the things I really enjoyed about Gentoo. Far less upgrade induced stress.
Kernel regression in Gentoo? No worries, boot the old one.
Kernel regression in Fedora? No worries, boot the old one... unless this was across an upgrade boundary. Then you get to have fun.
This is OK in most instances since I don't buy a lot of their software, but if you fail to get the firmware and the drivers working, it's a major problem.
Also, iOS 6/OS X 10.8 users are having trouble access points at my workplace, while other devices appear to be working fine. Since OS X 10.8, I'm also having trouble connecting it to my Samsung Galaxy S3's WiFi hotspot, whereas my girlfriend's 10.7 laptop is connecting without issue.
That said, every OS upgrade seems to have a bunch of issues that affect a small number of users, and the current ones don't seem particularly abnormal.
Google have known about it since mid-July https://code.google.com/p/android/issues/detail?id=34942
For example, I've had routers be unstable with some particular devices because of specific encryption settings. Ironically, I learned about that chipset problem while I was getting ready to throw dd-wrt on the offending router in frustration. I've had access points give super-slow connections to new devices until the AP was rebooted. And on and on.
WiFi works most of the time, but when it doesn't it usually isn't easy to figure out what (or even where) the problem really is.
At work my iPad3 is doing the same thing with our AES WiFi but working fine at home.
Also WiFi tethering is not working with similar issues between the two devices but bluetooth is fine.
Again iOS5 had been working perfectly for a year on these networks. I am not happy.