Apple issues second OS X 10.10.1 beta to developers, continues focus on Wi-Fi
Apple on Monday pushed out the second OS X 10.10.1 Yosemite beta seed to developers for testing with focus areas unchanged from the first version that went out last week.

The second seed, build 14B23, comes exactly one week after the initial maintenance update beta was released.
Apple is once again asking developers to focus on Wi-Fi, Exchange accounts in Mail and Notification Center, all tasks carried over from the previous OS X 10.10.1 beta.
After releasing OS X 10.10 Yosemite to the general public in October, users have complained of Wi-Fi and Bluetooth connectivity issues, suggesting the maintenance update may be targeting the root problem. There have been no reports of widespread Notification Center bugs.
Developers can access the latest OS X 10.10.1 beta seed through Apple's developer portal or Software Update.

The second seed, build 14B23, comes exactly one week after the initial maintenance update beta was released.
Apple is once again asking developers to focus on Wi-Fi, Exchange accounts in Mail and Notification Center, all tasks carried over from the previous OS X 10.10.1 beta.
After releasing OS X 10.10 Yosemite to the general public in October, users have complained of Wi-Fi and Bluetooth connectivity issues, suggesting the maintenance update may be targeting the root problem. There have been no reports of widespread Notification Center bugs.
Developers can access the latest OS X 10.10.1 beta seed through Apple's developer portal or Software Update.
Comments
In my opinion Yosemite has been the most stable .0 releases to come along in a long time. Since day one I can’t think of a single show stopper bug that has reared its ugly head. All of the new features work pretty well. Continuity, handoff, iOS phone calls, air drop all work just fine with my iPhone 6 (iOS 8.1).
Bug fixes are always good.
I haven't had any major problems with it, but I do find that my wifi can be erratic.
It really does blow on the retina though. Very annoying since that's my primary downloading computer.
I have the newest ac 3tb Time capsule also- as an fyi
I have had significant issues with slow wifi identification and connections via an iPhone hotspot. While my iPad will already be connected when I turn it on, my MacBook Pro requires me to turn the hot spot on and off and then wait a while for the MacBook to see it.
No apparent WiFi issues with my Early-2011 MBP i7. Pulled 29MBps from a supposed 25MBps Comcast connection. My late-2013 iMac is hard-wired to my Airport Extreme 802.11n router, so it's unknown if there is a problem there.
If you pull out the ethernet and use that 802.11n wifi router you can find out.
I am on the beta list, and I got the 10.10.1 update. I've never had a moment's trouble with my setup, so I still don't have it.
I've had to hunt out for the things -- I suspect old software -- that make my iMac (early 2008) seize up after a day running. It takes killing apps and general surgery until I can even restart. Then it works fine for about 17 hours.
One thing was, I didn't have the InstantOn plug-in installed in Audio Hijack. After I updated the software and installed the latest version of the plug-in, I could keep working at it all through the working day. But it hits a limit somehow after a while.
1. In Safari, when doing Save As..., the Finder window grows and grows with every save, until the buttons to Create Folder, Cancel and Save are outside the visible window.
2. I cannot open windows right to the bottom of the screen, there is a 5 or so pixel buffer that really irritates.
ARD has been a major issue with Yosemite for me, after extended screen sharing to a Yosemite Mac the system you are viewing will completely lockup for 5 minutes, the root cause seems to be the windowserver process running at over 70% cpu
No WiFi issues at all (13" MBA 2012).
But I've been getting slow / jumpy scrolling for large 2-column pdfs in Preview.
And the old 'stuck at the top' issue with Dictionary viewing of Wikipedia. Though it does go away after the whole page + media are loaded.
Done a full wipe reinstall once and tried numerous fixes, a lot of people having this problem apparently.
Generally, though, Yosemite has been great. I wish Apple would get on with iOS 8.1.1; that's much more needed. I'm getting tired of my iPhone rebooting every day, not to mention the incredibly slow iCloud Drive.
Oddly enough ARD has done some thing like this since 10.10... and the fix for viewing issue seems to be to change the view from rows to columns or vice versa. Haven't DL'd the current 10.10.1 seed to see if it persists for me. Tech Update Conference last week as "no comment" on ARD app 3.8 to match the 3.8 clients.
Wifi on my 2009 MacPro is all jacked up. Intermittent cutting out, dropping signal. Remote will connect for a second then it will crash the connection. Even having wired problems as well. No real Bluetooth issues as far as I can tell though.
I am having the same exact problems on my 2009 MacPro...
i have had unending bugs with the iCloud connectivity in both iPhoto and Aperture. The new photos will up load but I cannot get the old photos in 74 albums to download in either program. I know they are there as they appear in my iPad.
I have rebooted, repaired permissions. database etc etc etc. everything I know but no downloads.