MacBook trouble with airport

I have a rather odd combination of problems.
1. My MacBook cannot get the internet through my home Airport Express.
2. My wife's Powerbook, however, connects through that airport without difficulty.
3. My Macbook can print to a USB-printer connected to that airport.
4. My MacBook works fine with the Airport Express that I have at the office.
Suggestions?

I am not sure how your MacBook is setup in the Airport configurations but here is one tip that has helped me at home.
Some Internet Providers will not let you connect to the Internet through them unless you have a DNS server number typed into the DNS address.
If I am away from home, I can connect and use other WiFi connections without the DNS number in the DNS field box. However, if I am home, I cannot connect to my Internet Provider unless I put in their DNS number.
Give that a try at home and see if this works for you.
System Preferences/Network/Airport/
then click on configure and then TCP/IP, make sure you use a DNS number from your Internet Provider.

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    Maybe this extra info will help.
    Okay, looking at the Airport Admin Utility.
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    6. Now install 10.5.1, When you're done, again, all should be well. At least it was for me. My 10.5.1 install appears rock-solid, running the way Apple intended it to.
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