Just saw this in software update. Says it will fix the issue on the MacBook Pros with the first keystroke being missed. Installing Now...
This MacBook and MacBook Pro firmware update addresses an issue where the first key press may be ignored if the computer has been sitting idle. It also addresses some other issues.
The update package will install an updater application into the Applications/Utilities folder and will launch it automatically. Please follow the instructions in the updater application to complete the update process.
I've been having this problem since I got my MacBook Pro, which was long before Leopard.Because it's a Leopard only issue?