Like many places this forum here took also the leap forward to the new phpBB3 version. The transition has worked without a problem so far but there might be small things broken. If you find something that is off just send a PM or make a topic in the suggestions forum.
One thing is about the style. Obviously the old style could not be taken over just like this. It takes a bit of time to adapt it. Otherwise the old subsilver2 style is activated by default. This is a much cleaner and less performance hungry style than the new prosilver style phpBB3 comes equipped with. Should you though prefer this one just go to your user control panel and switch it back.
Oh to be a dragon, of silkworm size or immense...