My old iBookG4 is on its last legs and I'm in the market for a new MacBook. I'd be happy to get the new aluminum-encased 13 inch MacBook, but I remember that the old MacBook Pro's didn't always get the best wireless reception, and hearing that it had something to do with the aluminum-casing. (My old plastic-encased iBook was often better able to pick up a signal than friends' MacBook Pro's). Has anyone heard whether the new MacBook's have the same problem? Or is this something Apple fixed awhile ago? Any advice about whether to go with an older white MacBook to avoid this potential issue or get one of the new aluminum MacBooks would be greatly appreciated.