Type of Bug/Exploit : Lower Ore Vein Yields
Area of Bug Exploit (be as specific as possible) : Heidabyr Mines
NPCs involved (Be as specific as possible) : None
Chests involved : None
Timestamp on when it happened : 14:00 GMT 29 December 2010
Frequency of occurence : Twice.
In the Crafting Suggestions thread I commented on how long it took to use up a vein's worth of ore, and suggested the same yield be split between four or five veins of a quarter or a fifth the yield (which I did mean to be close to each other). That way an armour crafter could take a lot by mining them all and a jeweller a little by mining only one and without leaving a damaged vein.
Seems that half the suggestion has been implemented as three of the veins in Heidabyr are down to being about a quarter of the yield. First time I was suspicious but thought I was just unlucky and someone had left them damaged. Second time makes me think they have been changed.
And almost certainly deliberately.
But worth mentioning just in case.