Two today.
Sold a few bits and pieces on Ebay, and each and every one supplied their address in all lower case. So instead of a simple paste job to print out the label, had to alter it. I'd be ashamed to present a package in the post office when obtaining the stamps with an address printed in lower case.
Got a letter from Talk Talk. Saying an email to my (correct) address had bounced - and that I'd be charged more if they had to go to paper billing. I get a monotonous stream of such emails from them saying my online bill is ready for viewing - but I pay by direct debit so don't need to take any action. And I've received emails every single day to this address, so I'd know if it were out of action. Of course emails occasionally bounce for no reason (that I know of). Most would simply try again later. Seems that is too logical for a company providing broadband...