The Tweet stuff is in the left corner and the Quick solve/solution wizard/Dictionary,etc task bar has disappeared in my Mozilla Firefox.
Just tried it through BT Yahoo online explorer and its all back again with the Tweet stuff over to the right, seems like the browsers are having trouble formatting the way it looks on screen, maybe it's been redesigned to automatically try and put the Tweet stuff on the left and that disturbs the "Crossword Clue Solver" Logo which squashes it down and sacrifices the blue task bar.