AirPort gone crazy after 10.5.3

I'm having this issue too after installing to 10.5.3. Things hang every 3-5 minutes and I get the following messages in the syslog:

Jun 12 22:13:25 Macintosh SystemUIServer[135]: Error: airportd MIG failed = 1 ((os/kern) invalid address) (port = 68223)

Restarting airport brings net up again. This is frustrating...

Same for me. I tried several things, and just plain moving the antenna worked. At least I don't lose the connection now in a way that I need to switch the Airport on/off. But the signal strength looks really really chaotic. I could not remember to have problems like this before.

Agreed. I'm going to re-install 10.5 from the DVD and see if that solves it. I can't exclude the possibility that by airport card wanted to die at the same time the 10.5.3 upgrade was install, but that seems unlikely. And, since airport always works after turning it off and on again I suspect this is a software issue.

One has to wonder if Apple is getting lazy...

I am having this issue after 2 weeks. Every thing was fine with my new iMac for the first 2 weeks and now I cannot connect with my netgear router. However I have windows laptops and a new mac book pro on 10.5.4 which connect with no problems!

xxxxxx kernel[0]: WLC E_COUNTRY_CODECHANGED
Jun 15 12:11:41 xxxxxx kernel[0]: en1: 802.11d country code set to 'XA'.
Jun 15 12:11:41 xxxxxx kernel[0]: en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 40 48 56 64 104 112 120 128 136 36 44 52 60 100

xxxxxx kernel[0]: WLC E_COUNTRY_CODECHANGED
Jun 15 12:03:22 xxxxxx kernel[0]: en1: 802.11d country code set to 'DE'.
Jun 15 12:03:22 xxxxxx kernel[0]: en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 40 48 56 64 104 112 120 128 136 36 44 52 60 100

let's hope 10.5.4 solves the issue, this issue is VERY annoying... the first time airport has become unstable...!!!

one could always reinstall 10.5 and download the 10.5.2 updater, but i'd rather wait for the soon to be released 10.5.4...

I have exactly the same symptoms (gradual decline in signal strength, which returns to 100% after turning airport off and on), using an Apple Airport beacon. It all began after the 10.5.3 update. I have tried removing my DNS servers, changing channels, moving the antenna etc etc - in fact, the whole kaboodle I had to go through with 10.5.2 before something eventually worked. Now I'm doing it again. Come on Apple - let's see some signs of a) acknowledging there's a problem and b) doing something to fix it. Everything on my system is Apple - there's no third party kit involved here.

I reinstalled 10.5 and upgraded to 10.5.3 through Software Update. And lo and behold - WiFi works again.

I've had this problem too (new 24in iMac, fine until I isntalled 10.5.3, then it would lose connection (strangely whilst still showing that it was connected) every few hours).

After a lot of trial and error, this has fixed it for me - I set my airport basestation to a single channel (9) rather than allowing it to assign automatically, and enabled interference robustness on the basestation.

So far, this has kept a stable connection for two days now (previously I'd be lucky with two hours).

Hope this helps

Nick

i haven't had disconnect in a while... i noticed that i only happens with certain apps open... but i can't say which are to blame...

the last disconnect was like a week ago or so...