Hello.
I have almost same problem on MacBook Pro Retina,13-inch,Late 2013 OS X 10.9.1(1383116).
According to log, it looks airportd repeats connect and disconect too frequently when I connect bluetooth device(mouse,other PC for Airplay,smartphone,etc) .
Just turning on Bluetooth is fine.It occures when I CONNECT bluetooth device.
2.4GHz radio channel looks fine.
Other device(Android smartphone,iPad,iPod touch) are working without problem.
Wifi monitoring tool(I don't know what it is called in English interface) shows me there is no noise and S/N ratio is fine.
I guess Apple's Bluetooth driver and Wifi driver are conflicting.
I leave the part of log below.(SSID and MAC address are masked.)
It looks switching or roaming to same SSID and MAC address.
All MAC address masked as XX:XX:XX:XX:XX:XX are same.
It repeats untill Wifi is completely disconected.(For several hour? I can't stay watching.)
I'm in trouble that Mac losses network drive and Time Machine fails.
I'm planning to visit genius bar next week.
I hope this information will be help for somebody.
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Dec 20 17:06:35 MyMBP kernel[0]: ARPT: 1868.237588: MacAuthEvent en0 Auth result for: XX:XX:XX:XX:XX:XX MAC AUTH succeeded
Dec 20 17:06:35 MyMBP kernel[0]: wlEvent: en0 en0 Link UP virtIf = 0
Dec 20 17:06:35 MyMBP kernel[0]: AirPort: RSN handshake complete on en0
Dec 20 17:06:35 MyMBP kernel[0]: wl0: Roamed or switched channel, reason #3, bssid XX:XX:XX:XX:XX:XX
Dec 20 17:06:35 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:36 --- last message repeated 1 time ---
Dec 20 17:06:36 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:38 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:38 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:40 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:41 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:43 MyMBP kernel[0]: en0: BSSID changed to 00:00:00:00:00:00
Dec 20 17:06:43 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:47 MyMBP kernel[0]: ARPT: 1880.075667: MacAuthEvent en0 Auth result for: XX:XX:XX:XX:XX:XX MAC AUTH succeeded
Dec 20 17:06:47 MyMBP kernel[0]: wlEvent: en0 en0 Link UP virtIf = 0
Dec 20 17:06:47 MyMBP kernel[0]: AirPort: RSN handshake complete on en0
Dec 20 17:06:47 MyMBP kernel[0]: wl0: Roamed or switched channel, reason #4, bssid XX:XX:XX:XX:XX:XX
Dec 20 17:06:47 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:47 --- last message repeated 1 time ---
Dec 20 17:06:47 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:48 MyMBP kernel[0]: ARPT: 1880.721046: MacAuthEvent en0 Auth result for: XX:XX:XX:XX:XX:XX MAC AUTH succeeded
Dec 20 17:06:48 MyMBP kernel[0]: wlEvent: en0 en0 Link UP virtIf = 0
Dec 20 17:06:48 MyMBP kernel[0]: AirPort: RSN handshake complete on en0
Dec 20 17:06:48 MyMBP kernel[0]: wl0: Roamed or switched channel, reason #4, bssid XX:XX:XX:XX:XX:XX
Dec 20 17:06:48 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:49 --- last message repeated 1 time ---
Dec 20 17:06:49 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:51 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:51 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:53 MyMBP kernel[0]: en0: BSSID changed to XX:XX:XX:XX:XX:XX
Dec 20 17:06:53 MyMBP.local airportd[86]: _doAutoJoin: Already associated to "MySSID"・ Bailing on auto-join.
Dec 20 17:06:54 MyMBP kernel[0]: ARPT: 1887.353561: MacAuthEvent en0 Auth result for: XX:XX:XX:XX:XX:XX MAC AUTH succeeded