Something is wrong with both /auctioneer broker and /auctioneer bidbroker. The results they list are not *wrong*, but they are incomplete. Both searches miss obvious bargains, and they return maybe 1/5 as many results as they did before 2.0. Notably, they seem particularly to omit high-priced items in favor of commodities.
Also, I've found a minor bug associated with the posting of auctions. I use alt-shift-click for listing multiple auctions quickly in sequence. If I cursor over a new item before the previous auction has posted, when the sound plays signifying that the auction has posted, the Auctioneer info for the new item displays twice in the same window.
Yeah, actually. I first noticed this in the GUI version, and then played around with the command line versions to verify that the problem was replicable.