I apologise if this seems oddly specific and nitpicky, but while Browsing the website I’ve found two instances of the navigation behaving oddly.
1) The dropdowns on guildwars2.com seem to have a fade in that only triggers once on mouseover after the page loads.
Debugging tools catch the following error on line 7 of mediaCenter-base.3847484310.js
“Uncaught TypeError: Cannot read property ‘container’ of undefined”
2) The submenus of the ‘game’ dropdown on forum-en.guildwars2.com/forum
are assigned left: -12px when they appear. (css and scripts hint this should be -16px?)
This creates a 2px gap between the menus causing the submenu to dissapear before you can mouse over it.