[shouryuu]

When you shift click on an item in your inventory with the auction house window opened, it automatically set the search field to the name of the item you clicked on. For example, if you shift+click on [Big Bear Meat] your auction house search field will be [Big Bear Meat]

However, if you shift+click on an *empty* bag slot, you get the following error:
Interface\FrameXML\ChatFrame.lua:2677:bad argument #1 to strfind (string expected, got nil)

EDIT: I can't post on the US forums, so if someone were kind enough to pass this to the proper authorities, it would be cool :P