No, not that I used "principles" instead of "principals" in this morning's post.
The embarrassing admission is that I didn't learn to touch-type until only a few years ago. Oh, I took typing in high school, but instead of doing my work, I was using that big ol' Selectric to hunt'n'peck out some glurgy SF and Fantasy stories and got, like, a D or an F for my lack of effort.
I never used a typing tutor program and I don't touch type properly to this day, with "home keys" and whatnot, but somehow over the course of who-knows-how-many hundreds of thousands of words spewed into the internet, I realized some three years back that I wasn't really looking at the keyboard much anymore.
And that's when the homonyms attacked.
I don't have a problem with, say, "flaunt" and "flout", because they're different words, and my brain would never tell my fingers to type "he flaunted the law". And actual misspellings are pretty easy because they stood out to my eye long before computers started putting red squiggly lines under them. (Seriously, I've been known to turn a page in a book and a misspelled word in the middle of the page will leap into focus before my eyes can go start reading in the top left corner where they belong. I think that just comes from reading a lot.) But the verdammt homonym thing cropped up once my fingers could type without being watched constantly.
The brain tells the fingers to type "capitol" or "principal", and they wind up typing the much more frequently-used "capital" or "principle", and the brain never notices because it's halfway into the next sentence. I usually catch this in proof-reading, but sometimes it's early and you haven't had any caffeine and you just want to get something up on the blog before you're off to do other, more chore-like things, and you walk away from the keyboard leaving a hanging curve belt-high over the plate. Sigh.