Hi All, I've been having some trouble with my Airport Card on my 15" Titanium 400 MHz dropping the wireless connection for no apparent reason. It started with the connection working fine then it started to drop (meaning full signal to nothing) from time to time. The dropping has become progressively worse and now I rarely get signal at all. I tried the battery compartment trick, with no improvement. There is a discussion going on over on the Apple support site, which leads me to believe that it may be the upgrade to 10.4.2. <http:// discussions.info.apple.com/webx?14@@.68b3c235/19> Anyone else having this type of problem and have a fix? Is there an easy way to revert back to 10.4? Thanks for anyones help. -Michael Ramirez