Although the MacBook/Pro Keyboard Firmware Update 1.0 release seems to have proven successful, the guys at MacFixIt have reported that a large number of users on PowerBook or non-Leopard machines are still experiencing the "missing first letter" problem. In these cases, the computer seems to ignore the first keystroke when waking up from going idle.

Apple's recently-released update only applies to Intel-based MacBook and MacBook Pro laptops running Mac OS X 10.5.2 or later.

If you've seen this problem on your end or have heard about a forthcoming update for the older hardware, let us know in the comments or forums.