I have a 17" PB 1.5GHz, with the built in Airport Extreme card and I have been using it with 2 different wireless access points in my home with 10.3.x for the last 8 or 9 months with no problems. I usually leave it on all the time, and when not using it I just shut the lid and it goes to sleep. Upon opening it it would awake and all would be well. I would regain connectivity to my cable modem via Airport within 10 or 15 seconds.
This weekend I upgraded to Tiger (10.4) and while everything seems to work fine otherwise, when trying to connect to one D-Link access point it now takes at least a minute to get to the Internet. The Airport icon on the menu bar shows full strength right away, but I can't get to the Internet with a browser or Eudora. After a minute or so all is well until the next time I shut the lid, then I need to wait a minute or so again.
On the other D-Link I can connect to it via Airport, but can't get to the Internet with it. The Airport icon will go off and on a couple times then just stay off.
I tried power cycling both the access points as well as the cable modem, restarted the PB etc...
Both access points work fine with my WinXP notebooks.
Any other ideas, or is the a "wait til 10.4.1" type thing?