Numbers being typed as symbols on Macbook

[peternlewis]

Modifiers stuck down is an issue that has been see with the Logitech Control Center. For example:

Keyboard misbehavior triggered by...?

I’ve hesitated bring this here for several days, but frankly, I’m suddenly plagued with a keyboard problem. Let me be clear about a couple of things: first, this only started recently (and it’s intermittent) and second, I’m not laying this at KM’s doorstep. I’m looking for debugging suggestions. About a week ago, right after triggering a KM shortcut (control-option-command-1) to type my full name (something I’ve done a zillion times over the years without an issue) my keyboard began acting as …

Generally you can observe the keyboard with the system Keyboard Viewer (Show Keyboard Viewer is in the Keyboard status menu (icon menu at the top right)).