hi there,
today on browsing the esoui.com i get mozilla pop-up errors. i got a screeny of that. i never had that one before.
http://morwo.de/esoui-bug.JPG
Looks like our ajax tooltips were having trouble getting the data from our server. Thats the script when you hover over an AddOn name in the popular/new lists it shows a preview of the addon. If you refresh the page does it still happen? Seems to be working fine for me in Firefox, Chrome, Safari, IE.