So after much difficulty and interruption of productivity, I restored my Mini to Mt. Lion a week or so ago, but decided to leave Mavericks on my MBP to track updates and performance improvements.
A few times since then, starting up the MBP to copy over a few files via Air Drop or File Sharing has resulted in a network interruption. I've had to power-cycle the modem and router because no amount of fiddling with network settings restarts the connection. So I did the Google, and lo and behold, the Apple Support Forums are rife with similar posts. Mavericks messes — especially — with dual band routers (unless, of course, it's an AP Extreme).
So in addition to the Sys Prefs freezes, logout/shutdown problems, Mail issues, empty finder windows, etc., now add Networkus Interruptus.
I've had it up to my gills with this release. I'm restoring 10.8.5 on the MBP, too.
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