I may be the odd man out, but if I have a mistake I DEFINITELY want to know. I have told a couple people about mistakes and they were able to fix them. I don't consider it being critical at all. I would prefer to know before I give something to someone that there is a mistake.
I turned a block in a top that I posted here. I did not see that block until I saw it on the screen. Noone else seemed to notice. I am so thankful I saw it before I quilted it...If I hadn't seen it, I would hope someone would have told me.