I don't know how true they were, but I remember reading accounts of Afgans shooting down HINd choppers with old muzzleloaders...the soft lead would tend to stick to the tail rotor, or take a chunk out of it, which would throw it out of balance and bring the whole works down in a heap.
I have to wonder, though, how much of this most recent story was fabricated simply to motivate more Iraqi civilians to resist the infidel hords. While I'm sure it can be done, I have a hard time swallowing the fact that a farmer with a Mauser brought the bird down to begin with considering all of the redundant systems in the Apache, and secondly that the farmer was able to be tracked down for the photo-op. It seems to me that some AA or AAA gunners would have claimed that one, rightly or otherwise, if it weren't for propaganda gain.