I wrote an Automator script to toggle my wifi on and off and set it to run every time my MBP wakes from sleep. You can download it here: https://www.dropbox.com/s/35wywi0v53a29kn/Twiddle%20Wifi.app... (It's just the Automator script saved as a .app file)

Yes, I have the same problem. Not only with my MBP though, with my iPad as well so I'm not sure we're going to get the fix :-/

Ouch. Looks like I'm going to continue running Mavericks for now.