I had to rip out a bunch of knitting, most of an entire toddler sweater, because the pattern SUCKS. I can't complain too badly because it was free, and I got to practice the general idea of raglan sleeves. Maybe I just wasn't reading the pattern right, but it wasn't working. So I'm starting new, with a different pattern.
Next time I'll read the pattern all the way through, doing the math to make sure the sleeve edges will be the same length as the matching front and back edges.