Reminds me of a time when one of my colleagues was up against a really tight and important deadline, frazzled, trying to get work to press on a Friday evening so the printer could have things plated by Monday morning...
And then Quark starts throwing a major wobbly, so out of desperation, we're doing everything in far too much hurry... discarding preferences, messing with preferences and settings, eventually reinstalling... problem still there.
Turned out the keyboard was malfunctioning. 😀
Oh, how we laugh now. 😉