Update: This addon is no longer needed. Warmane has fixed all the issues that this addon was for.
Some time ago Warmane broke auction house addon functionality and even normal auction house functionality when switching pages too fast as described here (wotlk). Later the same problem appeared on Cataclysm.
When performing search requests too fast AH window gets bugged and has to be reopened to be usable again. This also breaks most AH addons.
This addon fixes the problem by delaying auction house search requests. As a result requests can not be sent too fast and auction house addons work slower than before but at least they work.
Download Warmane AH-fix v1.5 (wotlk)
Download Warmane AH-fix v1.2 (cata)
Version 1.6 (wotlk only): Search delay was added back and increased because of server side changes. - No longer needed after server side fix.
Version 1.5 (wotlk only): The addon now visually changes mails from auction house to show sender as either Alliance Auction House or Horde Auction House. In the new core some auction house mails include city in sender name (like Stormwind Auction House), which prevents addons that check auction house mails by sender name from working properly (for example BeanCounter).
Version 1.4 (wotlk only): Removed delay when searching or scanning auction house as it does not seem to be needed with the new core. On wotlk this addon is now only needed to post auctions using Auctioneer.
Version 1.3 (wotlk only): Added fix for problems with posting auctions with Auctioneer after May 20, 2015 update. Renamed to Warmane AH-fix. If you have older version delete it when downloading new one.
Version 1.2: Functions that ignore the increased delay (like sorting buttons in Auctioneer) will now freeze game for a short moment when trying to send request too early instead of breaking AH window. This should not happen often. Do not keep clicking during the freeze.
Version 1.1: Delay between sending request and getting response is also taken into account now. New request won't be sent too early if previous requests response was delayed.