WPA-PSK TKIP can't connect

If your wireless router allows for using AES encryption I would try enabling that. What type/brand of router?

I'm unfamiliar with that router, I've got a Linksys using DD-WRT Linux firmware and an Apple Extreme Base Station at 5Ghz, both have been flawless for months.

I do and have had no problems since Tiger. With Leopard, WEP is impossible as I posted a thread on this.

After I installed 10.5 wpa-psk isn't working anymore, wpa2-psk is working fine, but with respect to some windows users in my network i can't use it.

same problem. still unsolved. i have a partial solution in the thread i started here.

same problem. I have a linksys wrt54n v1 ap using wpa2 personal. i can connect and obtain an ip from the device; however, i can't ping the gateway. This problem appears to be arp related. Sometimes if i leave it alone for 20 or so minutes the mac learns the correct arp address and all works until the mac goes to sleep then the same problem again. a reboot fixes the problem until the mac goes to sleep. this has been a problem with 10.5 for a long time and 10.5.1 did nothing to fix the problem 10.4 works great. this is a serious problem and i have stopped any adoption of 10.5 at my organization until the problem is resolved. I hope Apple is reading this, in other words i have 500 macs that will not be upgrading any time soon.

As is the case with some other folks I, too, had no problems using WPA under Tiger but cannot connect with WPA under Leopard, at least not when using my NetGear WGU624 router... WEP works fine but not WPA.. When I try WPA, after some number of "connection failed" attempts it eventually will report that I connected successfully but when I try to access the internet, nothing... I also own an older router that I previously had stuck away in a closet, a Belkin F5D7230-4... This weekend I got it out and hooked it up to see if I got different results. And the answer is yes, both WEP AND WPA worked fine.... But I have other issues with that router accessing a security camera I own so for now I am staying with the NetGear and running WEP...

Bottom line is there is some sort of an issue coupled between using Leopard and CERTAIN BUT NOT ALL wireless routers... Plus I see other posts where folks are having an opposite problem, an issue with WEP where for them WPA works fine... Seems like an assortment of issues all of which have been generated since switching to Leopard...

Just tossing my experience into the mix in case that triggers anyone to guess at a possible reason which might lead to some solution... Thanks... bob..