I'm adding myself to this list. Posted already on the bug forum (http://us.battle.net/d3/en/forum/topic/6758986798) but hopefully adding on to a more active thread will bump it and attract some attention.
Also submitted a support ticket Tuesday morning (10/2) which remains "open".
And Javrius, you've been very quick to tell people with this issue that someone simply bid up to almost, but just barely not quite their max bid, somehow making the price *exactly* what was bid. From the FAQ you link:
For equipment such as weapons and armor, players are able to set a maximum bid to engage in automatic bidding; the system will automatically place a bid at the lowest possible winning price, in 5% increments (but no lower than 10 gold / $0.10 USD or equivalent), up to the maximum the player sets.
Unless their system does not work as advertised, a bid must be 5% greater than the previous bid, which must have been 5% greater than the one above it, etc. Thus, the price after n bids is starting price * 1.05^n
Meaning that from a given starting price, you know exactly what the bidding price will be some number of bids into the future. Anyone offering less than that will be told their bid doesn't match the minimum, and anyone offering more will automatically have their bid entered as the "lowest possible winning price". So unless it's possible to go from the starting bid to exactly 95.24% of your maximum bid by powers of 1.05, you will either lose the bid or be due a refund.
How likely does that seem? (never mind the fact that this incredibly precise bidding war happens mere seconds before the auction expires). Alternatively, we could look around the bug forum and realize that, in addition to our problem, there are many people who don't get paid when they sell an item, or who don't get refunded when they're outbid. The mechanic for overbidding is that your maximum bid is taken out of your stash, then any amount by which you overbid is refunded. It seems like the larger problem is that the AH periodically "loses" gold (ever wonder where the Treasure Goblins get it from?), and that any time you're expecting gold from the AH for whatever reason there's a chance you'll be left holding the bag.
I'm curious if anyone has had any success with support tickets with this issue, or if we can get some sign this is even being noticed by Blizzard...