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nMP 6,1 USB Keyboard missing keystrokes - Intermittently

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Anyone noticed intermittent problems with the keyboard - especially at boot time. For example pressing Option after the chime is inconsistent - sometimes it appears to work and sometime not. If I then try to use the BT Trackpad to select a boot drive that never works. Using the keyboard arrow keys, sometimes they works and sometimes not. Its like they keys jump all over the place.

Although I am sure of the above problem, I am less sure about the following:
Once the machine boots the keyboard works but if I use the Apple supplied USB extension for the keyboard, I believe I get missing keystrokes. Just once and awhile.

Its kind of hard to tell but every now and then, there are letters missing from text that I have been typing. It could be just me and my aging fingers, but I didn't have the problem before the new machine arrived 1 week ago.

As a work around and in order to get the keyboard to reach the machine, I had to switch from the Apple USB extension cord to an Anker USB 3 hub - then I don't get any missing keys.

Seems like a USB firmware issue?

Anyone else notice this?

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