funnily enough i got a lovely pair of black patent pumps from asos, wore them nearly every day for 2 weeks, then the heel fell off on my way to work yesterday. I took them to the shoe man and he said he couldn't fix them as the heels were just stuck on with glue! He tutted a bit when he saw they were asos too - kind of a 'back-in-the-day-shoes-were-made-proper' kind of grumble...
However they were only £15, so I might just get another pair - can't go wrong for that price