... someone sends you a PM asking for something in reply, and so you type out a nice cheery response, maybe with a bit too much info, but what the hey, and so you hit send and what happens ... the yahoo has neglected to make room for your reply in their mailbox, maybe because they're just a bit scatter-brained, or maybe they aren't real computer savvy, or maybe this vBulletin crap is just too hard to figure out, or maybe they're just too busy being Swish Baby

Any pet peeves you'd like to share?