The Esperanto flag is missing on my profile word count page. All my other flags are working OK. (FF 15 on Windows, Mobile Safari on iOS 5)
The flag is also missing from the drop down menu above the weekly activity section on the right hand side of the profile page.
By no means a critical problem!
PS. I do like this new group of word counts with the flags, (even despite the political dangers of using national flags to represent languages).