The Armory has been updated with improvements to enhance the effectiveness and performance of the wide range of functions it offers. You’ll find that the paging and sorting features have been enhanced and the tooltips which appear when mousing over items should be much more responsive. In addition, the ‘Find an Upgrade’ function should now be more intuitive, providing recommendations which are more customized to your character. Last, but not least, the address of the Armory has changed to http://eu.wowarmory.com.
You can review the full list of enhancements at the Updates page.
Original post by World of Warcraft Community Site