Over on GearDiary, Judie Lipsett has posted an article concerning wireless issues she had when restoring a MacBook Pro backup from Apple’s Time Capsule to a new MacBook Air.
The issue she was running into was that she was seeing an empty wireless cone in the menu bar, even when she had wireless connectivity (a problem if you need to know the signal strength).
Turns out this happens (in what numbers, hard to say, some people may not bother fixing it since the wireless is still working).
Rather than reinstalling or reloading a backup, Judie ditched her .plists and reconfigured a new network setting.
In the future, if you happen to be doing such a migration, you might unselect the network settings in the migration/reloading.