I have two iBooks. I just installed the latest 10.4.7 updates and all other updates, such as security updates, quicktime, etc. Ever since this update, when I wake the iBooks from sleep the DCHP seems to fail renewal, or some TCP problem seems to exist for a minute or two. The iBooks both connect to the wireless network without a problem, but sites fail to load. The problem sometimes seems to go away if I "Turn AirPort Off" in the menu bar and then turn it back on. Any ideas? Is this a known issue with the latest OS X updates? Thanks.