Illia, the show/hide function on item pages is still wonky.
An example is the page for Moss Agate.
http://wow.allakhazam.com/db/item.html?witem=1206&locale=enUS;source=live
On the first page load, it says "Hide" next to "Found in Objects". You have to click that twice to get it to actually show the list.
I also had some strange behavior clicking the Show link on the Zones under Drop Information, but now I can't replicate it. >.<