A couple of months ago, I set up Thunderbird (Mozilla's email program) as an IMAP client for my Gmail account. I didn't really need to, per se, but I wanted to see what all the fuss was about.
Today, when I fire up Thunderbird to check my Gmail, IMAP fails completely. I log into my gmail account via the web, and all IMAP-related settings on my account have been completely removed. It's not just disabled-- it's completely vanished.
Weird, huh?