Airport performance slow after 10.5.8 upgrade

After the 10.5.8 OS upgrade I noticed that my MBPro's wifi internet was really slow, less than 2Mbps when it should be 10 - 15Mbps! I thought it was Comcast but tested the speed with the LAN Ethernet connected and the speed was normal. I tested it on my wife's black MacBook 13 inch and got slow speed on WiFi too.
I tested the speed on my hackintosh Dell Mini 9's WiFi and the speed was nice at 15Mbps. So I figured it was a firmware issue. I couldn't find anything similar to my problem here in the discussion so I was going to post the issue but then, as if Apple magically saw my issue, I received an Software Update notice about an update for the Airport Client that fixes performance issues when running on battery. So I ran the update and it fixed the problem. So for those of you out there who are wondering why their MacBook Pro and MacBook 13 has slow bandwidth, try the update.
DLP

I have the same with my NAS. In the beginning of Leopard the same thing happened, with the connect to the server a Finder window of the disk would open. But in the last 4-5 version everything went as it was supposed to. And now I end up with all these open windows ;-(. Annoying.
Detail, I connect using a SMB server.
Would appreciate it very much if this is solved in the near future.
Message was edited by: ArjanM

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