OK, I have four different Macs getting on the web via an Airport base station, repeated by two Airport Express units, one upstairs and one downstairs. All of the computers except one have zippy speeds on line. The one that doesn't is slow as a dog, and I can't figure out why. It's a PB G4 1.5 MHz, topped out at 1.5 GB of RAM. Even the iBook 933 MHz running on 1.2 GB of RAM is faster. All of the machines are on 10.5.6, by the way. Any ideas?

I should say that the only thing I've done is to repair permissions on the PB--nothing else.
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