I've nearly finished a jumper I started in January, and I've bloody run out of yarn! There's maybe a day's worth of knitting left, I was so close to finishing the wretched thing lovingly-made gift. So I track down the make (because like an idiot I threw out the labels) and it's been discontinued . Luckily it's on eBay... in ten-packs only.
Life lesson: always buy an extra ball. Please pray to the woolly gods that the dye lots match.