Apple has released a firmware update for the 2009 Aluminum Apple Wireless Keyboard that improves battery performance when using them in conjunction with other Bluetooth devices such as the Magic Mouse or some Bluetooth headsets. Apple notes that your keyboard must be connected or paired to be able to perform the update. More information regarding installation instructions is available on Apple's Web site. The update is available via Software Update and the Apple Support Downloads page. (Free, 1.14 MB)
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File Email with a Key in Apple Mail
In Mac OS X 10.4 Tiger or later, you can use the simple and fun MsgFiler Mail plug-in to file Mail messages using keyboard shortcuts.
New in Apple Mail 4 (the 10.6 Snow Leopard version), to assign a keyboard shortcut to any mailbox on the Move To or Copy To submenu, you can also open the Keyboard pane of System Preferences, click Keyboard Shortcuts, and select Application Shortcuts in the list on the left. Click the + button, choose Mail from the Application pop-up menu, type the name of the mailbox in the Menu Title field, click in the Keyboard Shortcut field, and press the keystroke combination you want to use. Then click Add.
Written by
Tonya Engst
2009 Aluminum Keyboard Firmware Update 1.0
by Doug McLean 
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Firmware Update could not find keyboard.
Attempted to install this update on a brand new aluminium wireless keyboard that came with a brand new 21.5-inch iMac. Keyboard was 'stuttering' by repeating random characters without being touched. Firmware version in System Profiler indicated keyboard update was necessary. Bluetooth in System Prefs shows Keyboard is paired, but Firmware Update reports no keyboard. Tried another brand new aluminium keyboard from a recently purchased 27-inch iMac, same result. (Yes, I am in Sydney, Australia, where we spell it aluminIUM).
Attempted to install this update on a brand new aluminium wireless keyboard that came with a brand new 21.5-inch iMac. Keyboard was 'stuttering' by repeating random characters without being touched. Firmware version in System Profiler indicated keyboard update was necessary. Bluetooth in System Prefs shows Keyboard is paired, but Firmware Update reports no keyboard. Tried another brand new aluminium keyboard from a recently purchased 27-inch iMac, same result. (Yes, I am in Sydney, Australia, where we spell it aluminIUM).
It was also supposed to prevent unintentional double-keying (typing "ii" instead of "i"), which had been a minor problem for me and which I'd thought was my own wacky fingers. Since the update, the double-keying has been far worse.
I just installed this update and now my symbol keys are all messed up...for example I can't find the "at" key (above the 2), and have had to find all of the symbols you see in this post...they're no longer where they should be! Anyone know how to roll this back? Don:t say Time Machine...I don:t have it set up yet.